Plant List R
| Ramonda | myconi | Clusters of pretty deep violet-blue flowers with yellow anthers. Height 10cm. Moist well-drained soil in part shade. May.-Jun. | |
| Ranunculus | acris | "Flore Plena" | An erect clump-forming perennial with divided mid-green leaves and stems of double yellow flowers. Height 30-90cm. Moist well-drained soil in part shade. Jun.-Jul. |
| Ranunculus | calandrinioides | Big, wavy, glaucous lanceolate leaves. Large white goblet-shaped flowers. Height 20cm. Well-drained soil in sun or part shade. Jan.-Mar. | |
| Ranunculus | constantinopolitanus | "Plenus" | An erect clump-forming perennial with deeply cut mid-green leaves and stems of double yellow flowers. Height 30cm. Apr.-Jul. |
| Ranunculus | cortusifolius | Large yellow buttercup flowers on stems rising up to 1.5m. Can be grown in part shade in dryish conditions. Mar.-May. | |
| Ranunculus | ficaria | "Brambling" | Pointed maroon-brown leaves marked with pewter and small yellow flowers. Height 15cm. Moist soil in part shade. Feb-May. Summer dormant. |
| Ranunculus | ficaria | "Brazen Hussy" | Pretty brown leaved form of the native celandine. Yellow buttercup flowers in Mar-Apr. Height 10-15cm. Goes dormant by June. Most soils and conditions. |
| Ranunculus | ficaria | "Collarette" | The leaves have dark markings on them with the flowers having a tight central boss of golden yellow with the outer petals being a paler yellow. Height 5cm. Moist soil in part shade. Mar.-Apr. |
| Ranunculus | ficaria | "Copper Nob" | Pretty brown leaved form of the native celandine. Orange buttercup flowers in Mar-Apr. Height 10-15cm. Goes dormant by June. Most soils and conditions. |
| Ranunculus | ficaria | "Flore-pleno" | A spreading perennial with heart-shaped glossy, dark green leaves. Short stems of fully double golden yellow flowers with bronzey backs. Height 5cm. Moist soil in part shade. Mar.-Apr. |
| Ranunculus | ficaria | "Green Petal" | A spreading perennial with heart-shaped glossy, dark green faintly marbled leaves. Short stems of double green-yellow flowers in early spring. Height 5cm. Moist soil in part shade. |
| Ranunculus | ficaria | "Salmon's White" | A spreading perennial with heart-shaped glossy, pale green leaves with bronze marks. Short stems of cream flowers tinted purple-blue on the reverse of the petals. Height 5cm. Moist soil in part shade. Mar.-Apr. |
| Ranunculus | gramineus | Narrow grey-green foliage with clear yellow buttercup flowers. Rich, moist soil in sun or part shade. Height 30cm. Mar.-Apr. | |
| Ranunculus | montanus | "Molten Gold" | A mat-forming perennial with glossy dark green basal leaves and stems of cup-shaped, shining bright yellow flowers. Height 10cm. Moist well-drained soil in sun or part shade. Jun.-Jul. |
| Raoulia | australis | A mat-forming evergreen alpine with silver-grey hairy leaves. Sulphur-yellow flowerheads. Height 1cm. Spread 30cm. Well-drained soil in sun or part shade. Jun.-Aug. | |
| Ratibida | columnifera | "Red Midget" | Thin pinnate leaves and stems carrying flowers with elongated central cones and drooping brown-red petals with yellow edges. Height 60cm. Well-drained soil in sun. Jul.-Aug. |
| Rehmannia | elata | A rosette-forming perennial with conspicuously veined mid-green leaves and semi-pendent pinkish purple flowers, spotted inside. Height 1.5m. Well-drained, sheltered site in sun. Jun.-Sep. | |
| Reineckia | carnea | An evergreen perennial with arching green leaves and fragrant deep pink flowers, rarely followed by red berries. Height 20cm. Moist peaty soil in part shade. Apr.-May | |
| Rhaphiolepsis | umbellata | A bushy evergreen shrub with leathery, dark green leaves. Pretty white flowers sometimes tinted rose-pink. Height 1.5m. Spread 1.5m. Moist well-drained soil in sun. June to July. Shelter from cold drying winds. | |
| Rhaphiolepsis | x delacourii | A dome-shaped, evergreen shrub with leathery, dark green leaves. Pretty star-shaped dark pink flowers. Height 2m. moist well-drained sheltered site in sun. May to June. | |
| Rhaphithamnus | spinosus | An evergreen shrub of dense habit with small, glossy green sharply toothed leaves and small tubular hanging, slightly scented lavender flowers, followed by glossy purple-blue fruits. Height 3-4m. Spread 2-3m. Well-drained soil in a sheltered site. Flower | |
| Rhodanthemum | "African Eyes" | Silvered filigree foliage and stems of daisy flowers with white petals and dark brown centres. Height 25cm. Well-drained soil in sun. Needs winter protection. | |
| Rhodanthemum | catananche | A silver-grey leaved perennial with daisy-like cream flowers with a maroon stripe and a small yellow centre. Height 15cm. Well-drained soil in sun. Jun.-Aug. Frost hardy. | |
| Rhodanthemum | hosmariense | A spreading subshrub with divided silver leaves and daisy-like white flowers with a yellow centre. Height 10-30cm. Well-drained soil in sun. Mar.- Sept. | |
| Rhododendron | "Addy Wery" | An evergreen shrub with mid-green hairy leaves and vermillion-red flowers. Height and spread 90cm. Moist well-drained acidic soil in sun or part shade. Apr-May. | |
| Rhododendron | "Anna Baldsiefen" | A dwarf upright growing form with light green leave turning bronze-red in winter. Funnel-shaped flowers, vivid phlox-pink with deeper coloured wavy margins. Height 60cm. Moist well-drained acid soil in sun or part shade. Mar.-Apr. | |
| Rhododendron | "Arctic Tern" | A compact, upright, free-flowering shrub with glossy green leaves and tubular flowers, white tinged green in globular heads. Height 1m. Moist well-drained acid soil in sun. Apr.-May. | |
| Rhododendron | "Bright Forecast" (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, light yellowish-orange fragrant flowers with a deep orange blotch. Height and spread 1.5m. Moist well-drained acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Carmen" | Deep red bells on plants 30cm. high. Apr-May. Sunny site in acid soil that doesn't dry out. Good in pots. | |
| Rhododendron | "Chikor" | Soft yellow flat-faced flowers with deep reddish spots. Bronzey foliage in winter. Height 45cm. Sunny site in moist acid soil. Apr-May. Good in pots. | |
| Rhododendron | "Cilipense Group" | A neat rounded form with glossy-green bristle-margined leaves and loose trusses of relatively large, shallowly bell-shaped white flowers flushed pink. Height 1m. Moist well-drained soil in sun or part shade. March. | |
| Rhododendron | "Crane" | A dwarfish variety with small glossy green leaves and pale purplish pink flowers fading to white. Height 60-90cm. Moist well-drained acidic soil in sun. Mar-Apr. | |
| Rhododendron | "Curlew" | Small, shiny dark green foliage and open bell-shaped light yellow flowers with greenish-brown spots on the upper petals. Height 45cm. Moist well-drained acid soil in sun or part shade. Apr-May. Good in pots. | |
| Rhododendron | "Dora Amateis" | A compact evergreen shrub with clusters of pretty, funnel-shaped, white flowers flushed pink inside with small green flecks. Height 60cm. Moist well-drained acid soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Dormouse" | Compact shrub with pink bell-shaped flowers. The new leaves are a lovely copper colour. Apr.-May. Height 1.5m. Acid soil in sun or part shade. | |
| Rhododendron | "Egret" | A compact form with glossy dark green leaves and wide funnel-shaped flowers, white tinged green. Height 45cm. Moist well-drained soil in sun or part shade. April. | |
| Rhododendron | "Gibralter (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, brilliant orange flowers opening from crimson-orange buds in spring. Height 1.5m. Spread 1.5m. Moist well-drained acid soil in sun or part shade. April to May. | |
| Rhododendron | "Ginny Gee" | Bright pink buds open to a lighter pink with a white tinge. Height 75cm. Sunny site in moist acid soil. April. | |
| Rhododendron | "Glowing Embers (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, vivid reddish orange flowers marked orange in the throat in spring. Height 2m. Spread 2m. Moist well-drained acid soil in sun or part shade. April to May | |
| Rhododendron | "Hachmann's Rokoko" | A compact evergreen shrub with rounded, glossy leaves that darken in winter and double hose-in-hose flowers. Height 40cm. Spread 70cm. Moist well-drained acid soil in sun. Flowers from April to May. | |
| Rhododendron | "Halfdan Lem" | A large flowered hybrid with attractive deep green leaves and red buds that open to thick-textured deep bright red trusses with 12-14 florets on mature plants. Height and spread 1.5m. Moist well-drained acid soil in part shade. Flowers from during May. | |
| Rhododendron | "Hansel" | A lovely small evergreen shrub with beautiful dark green foliage covered underside with indumentum and shell-pink flowers with a salmon-orange edging. Height 90cm. Spread 75cm. Moist well-drained acid soil in part shade. Flowers from April to May. | |
| Rhododendron | "Harvest Moon" (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, straw-yellow flowers with a chrome-yellow flare in spring. Height 1.5m. Spread 1.5m. Moist well-drained acid soil in sun or part shade. April to May | |
| Rhododendron | "Irene Koster"(Azalea) | A bushy, deciduous shrub with clusters of pretty, funnel-shaped pink suffused yellow flowers with orange-yellow flashes inside. Height and spread 2m. Moist well-drained acid soil in sun or part shade. Flowers from May to June. | |
| Rhododendron | "Joseph Hill" | An evergreen azalea with hairy green leaves that turn maroon in winter. covered in red flowers in late spring/ early summer. Height 50cm. moist well-drained acid soil in sun or part shade. | |
| Rhododendron | "Koster's Brilliant Red" (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, glowing orange-red flowers in spring. Height 1.5m. Spread 1.5m. Moist well-drained acid soil in sun or part shade. May. | |
| Rhododendron | "Megan" (Azalea) | An evergreen shrub with small slightly hairy shiny leaves with large lilac-pink flowers with purple dots on the upper petals. Height 1.5m. Moist well-drained acid soil in sun or part shade. Flowers during May. | |
| Rhododendron | "Moerheim" | Aster-blue flowers over glossy foliage that turns maroon in winter. Height 30cm. Moist acid soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Moser's Maroon" | A vigorous, tall growing hybrid with copper-red young growth. The flowers are maroon-red with darker markings within. Height 3m. Moist well-drained acid soil in part shade. May-Jun. | |
| Rhododendron | "Mother's Day" | An evergreen shrub with smallish hairy pointed leaves that turn maroon-purple in autumn and clusters of pretty rose-red flowers. Height 75cm. Spread 75cm. Moist well-drained acid soil in sun. Flowers from April to May. | |
| Rhododendron | "Nancy Evans" | An evergreen shrub with deep green glossy leaves and orange buds opening to golden yellow flowers. New growth is an attractive bronze colour. Height 1.2m. Moist well-drained acid soil in part shade. May. | |
| Rhododendron | "Nico" (Azalea) | A low spreading, evergreen shrub with clusters of red flowers and good autumn colour. Height 75cm. Spread 1.2m. Moist well-drained acidic soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Night Sky" | Blue flowered hybrid, growing up to 60cm. For a sunny spot in moist acid soil. Mar.-Apr. Good in pots. | |
| Rhododendron | "Palestrina" (Azalea) | An evergreen shrub with pale green leaves and white flowers with a yellow blotch. Height and spread 90cm. Moist well-drained acidic soil in sun or part shade. Apr-May. | |
| Rhododendron | "Patty Bee" | Easily grown dwarf variety with pale yellow flowers. Leaves turn bronze in winter. Height 45cm. Moist acid soil in full sun. Apr.-May. | |
| Rhododendron | "Persil" (Azalea) | A deciduous shrub with clusters of funnel-shaped, pure white flowers each with a bold orange-yellow flare in spring. Height 2m. Spread 2m. Moist well-drained acid soil in sun or part shade. April to May. | |
| Rhododendron | "Phalarope" | A small shrub with shiny green leaves and open bells of lilac pink. Height 1m. Moist well-drained acid soil in sun or part shade. | |
| Rhododendron | "Pink Drift" | A neat dwarf shrub with small grey-green aromatic leaves and clusters of soft lavender-rose flowers. Height 30cm. Moist well-drained soil in sun or part shade. | |
| Rhododendron | "Pink Pebble" | Free-flowering dense shrub with loose trusses of rose-pink flowers from red buds. Pretty bronze-tinged new foliage. Height and spread 1m. Acid soil in sun or part shade. April to May. | |
| Rhododendron | "Point Defiance" | An evergreen shrub with dull green elliptic leaves and dark red-pink buds opening to pink flowers with a light centre. Trusses are large with up to fifteen flowers. Height and spread 2m. Moist well-drained acid soil in part shade. Flowers from April to Ma | |
| Rhododendron | "Polar Bear" | A late flowering hybrid with large mid-green leaves, paler beneath, bearing large trusses of trumpet-shaped, very fragrant pure white flowers, with a light green flash inside. Height and spread after 10 years 5m. Moist well-drained acidic soil in part sha | |
| Rhododendron | "Praecox" | An early-flowering evergreen shrub with clusters of widely funnel-shaped, rose-purple flowers. Height 1.2m. Moist well-drained acidic soil in part shade. Feb.-Mar. | |
| Rhododendron | "Princess Anne" | Pale yellow flowers tinged green. Height 60cm. Moist acid soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Ptarmigan" | Pure white flowers with dark stamens on a plant with a lax habit. Height 30cm. Sunny spot in moist acid soil. Mar.-Apr. Good in pots. | |
| Rhododendron | "Ramapo" | A stiff, slightly spreading shrub with grey-green leaves and pale violet-blue flowers. Sunny site in moist acid soil. Height 60cm. Mar.-Apr. Good in pots. | |
| Rhododendron | "Royal Ruby" (Azalea) | A deciduous shrub with clusters of deep red flowers and good autumn leaf colour. Height and spread 1.5m. Moist well-drained acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Sacko" | Blue-purple flowers on compact plant of 60cm. Sunny site in acid soil that does not dry out. Good in pots. Apr.-May. | |
| Rhododendron | "Saint Merryn" | A small evergreen shrub with greyish-green foliage and clusters of violet-blue flowers. Height 75cm. Well-drained acid soil in sun or part shade. Apr.May. | |
| Rhododendron | "Salmon Leap" (Azalea) | An evergreen shrub with cream variegated leaves and pink flowers. Height and spread 90cm. Moist well-drained acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Saturnus" (Azalea) | A deciduous shrub with clusters of pretty, funnel-shaped, bright orange-red flowers. Height 1.5m. Spread 1.5m. Moist well-drained acid soil in sun or part shade. April to May | |
| Rhododendron | "Scarlet Wonder" | A semi-dwarf evergreen shrub with clusters of funnel-shaped, bright scarlet-red, slightly frilled flowers. Height 1.2m. Moist well-drained acidic soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Silver Queen" (Azalea) | An evergreen shrub with cream variegated leaves and pink flowers. Height and spread 60cm. Moist well-drained acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Sir Charles Lemon" | Attractive lanceolate leaves with cinnamon brown indumentum beneath the leaves. Flowers are ivory white. Height 1.5-2m. Spread 1.5m. Moist well-drained acid soil in part shade. Flowers from April to May. | |
| Rhododendron | "Snipe" | An upright grower with beautiful trusses of bell shaped lilac-pink flowers with magenta spotting produced in abundance. Height 40cm. moist well-drained acid soil in sun or part shade. April. | |
| Rhododendron | "Snowlady" | Small spreading shrub with hairy mid-green leaves and fragrant white flowers. Height 1.2m. Acid soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Swift" | Yellow flowers, strongly flushed red on plants 60cm. high. Sunny site in acid soil that doesn't dry out. Apr-May. Good in pots. | |
| Rhododendron | "Terracotta Beauty" (Azalea) | An evergreen shrub with clusters of pretty white flowers with an orange tinge. Height 50cm. Moist well-drained acid soil in sun. April to May. | |
| Rhododendron | "Tessa" | An early flowering hybrid with clear pink flowers with crimson spots and deep coloured leaves. Height 1.2m. Moist well-drained acid soil in sun or part shade. | |
| Rhododendron | "Titian Beauty" | A "yakushimanum" hybrid forming a compact, upright evergreen shrub with deep green leaves and dense clusters of bell-shaped, waxy red flowers. Height 2m. Spread 2m. Moist well-drained acidic soil in sun or part shade. Flowers from May to June. | |
| Rhododendron | "Vida Brown"(Azalea) | A low spreading, evergreen shrub with clusters of rose-pink hose-in-hose flowers. Height 75cm. Spread 1.2m. Moist well-drained acidic soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Vinecourt Duke" (Azalea) | A deciduous shrub with clusters of deep pink, scented, semi-double flowers and good autumn leaf colour. Height and spread 1.5m. Moist well-drained acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Viscy" | Large green leaves on a bush of open habit, bearing trusses of campanulate flowers, opening orange with strong red spotting, ageing to coppery yellow. Height 1m. Spread 1.2m. Acid soil in sun or part shade. Flowers from April to May. | |
| Rhododendron | "Wee Bee" | A very dwarf variety with dark green leaves. Yellowish-pink buds open to red flowers with a pink throat. Height 45cm. Moist well-drained acid soil in sun. Apr.-May. | |
| Rhododendron | "Willbrit" | A small compact shrub of rounded habit with dark green leaves, reddish when young. deep pink, bell-shaped flowers paler at the margins. Height 1m. Moist well-drained soil in sun or part shade. Apr.-May. | |
| Rhododendron | "Wren" | Elliptic, dark green, glossy leaves that turn bronze in winter. Clear yellow funnel-shaped flowers. Height 50cm. Sunny spot in moist acid soil. Flowers from March to April. Good in pots. | |
| Rhododendron | "Yellow Hammer" | A slender hybrid with small tubular flowers of clear empire yellow in clusters of two or three. Height 1m. Sunny site in acid soil that doesn't dry out. Mar.-Apr. | |
| Rhododendron | campylogynum | "Myrtilloides" | A dwarf evergreen shrub with small aromatic foliage. Flowers waxy plum-red to light mauve bells. Height 30cm. Moist acid soil in sun. May. |
| Rhododendron | decorum | Forms a large shrub or small tree with fissured bark and dark green glossy leaves glaucous underneath. Trusses of open, funnel shaped, strongly fragrant white flowers often with a yellowish centre and pink tinges. Height and spread 2-6m. Moist well-drain | |
| Rhododendron | hippophaeoides | "Haba Shan" | A small erect species with greyish-green leaves and small flat-faced lilac flowers with orange stamens. Height 60cm. Moist well-drained soil in sun or part shade. mar.-Apr. |
| Rhododendron | impeditum | An evergreen shrub with small, aromatic, grey-green leaves and clusters of mauve-blue flowers. Sunny spot in moist acid soil. Height 30cm. Mar.-Apr. Good in pots. | |
| Rhododendron | impeditum | "Blue Steel" | More compact than the species with blue flowers over the small grey-green leaves from Mar.-Apr. Sunny spot in moist acid soil. Height 30cm. Good in pots. |
| Rhododendron | impeditum | "Indigo" | A dwarf evergreen with small grey-green leaves and indigo-blue flowers. Moist acid soil in sun. Height 30cm. Apr.-May. Good in pots. |
| Rhododendron | keiskei | A dwarf semi-evergreen species with dull greyish-green lanceolate leaves and wide funnel-shaped pale lemon yellow flowers. Height 25cm. Moist well-drained acid soil in sun or part shade. Mar.-May | |
| Rhododendron | luteum | A deciduous shrub with mid-green leaves that turn crimson, purple and orange in autumn. Sticky winter buds open to pretty funnel-shaped, highly scented, yellow flowers. Height 4m. Spread 4m. Moist well-drained acid soil in part shade. Flowers from May to | |
| Rhododendron | macabeanum | Forms a large shrub or small tree with huge leaves up to 45cm. long, dark shiny green above, greyish-white tomentose beneath. Large trusses of pale yellow, purple blotched flowers. Height 6-7m. Spread 5m. Moist well-drained acidic soil in part shade. Flow | |
| Rhododendron | makinoi | A compact, upright evergreen with narrowly lanceolate leaves covered on the underside with a fawn indumentum. New growth is covered in a silvery tomentum. Height 1.5m. Moist well-drained acid soil in part shade. May-Jun. | |
| Rhododendron | nakaharae | "Mariko" | Relatively large scarlet flowers over hairy foliage. Height 20cm. Moist acid soil in sun or part shade. Jun.-Jul. More prostrate in habit than "Mount Seven Star" |
| Rhododendron | nakaharae | "Mount Seven Star" | Relatively large scarlet flowers over hairy foliage. Height 30cm. Moist acid soil in sun or part shade. Jun.-Jul. |
| Rhododendron | nakaharae | "Orange" | Orange-pink flowers on a bush wider than high. 30cm. x 60cm. Sunny spot in moist acid soil. Flowers June. |
| Rhododendron | nakaharae | "Pink" | Hairy, slightly pointed leaves and pink flowers on a bush 30cm. x 60cm. A sunny spot in moist acid soil. Flowers June. |
| Rhododendron | nakaharae | "Red Fountain" | Dwarf evergreen shrub with small pointed hairy leaves. Scarlet-red flowers in late spring. Height 40cm. Moist well-drained acid soil in sun or part shade. |
| Rhododendron | pemakoense | A compact dwarf, evergreen shrub with glossy dark green leaves. Clusters of bell-shaped pink or rose-purple flowers. Height 60cm. Moist well-drained acid soil in sun or part shade. March-April. Can be grown in pots using ericaceous compost. | |
| Rhododendron | pumilum | A dwarf evergreen shrub with small, narrow, scaly leaves, glaucous underneath and small pink to rose bell-shaped flowers. Height 25cm. Moist well-drained acid soil in sun or part shade. Apr.-May. | |
| Rhododendron | rex ssp. fictolacteum | A large shrub or small tree with cinnamon tomentose young shoots and long dark green leaves, brown tomentose beneath up to 30cm. long. Bell-shaped creamy white flowers with a crimson blotch in large trusses. Height up to 5m. Moist well-drained acid soil i | |
| Rhododendron | yakushimanum | A tight dome-shaped, evergreen shrub with dark green leaves, reddish brown beneath. Clusters of bell-shaped, apple-blossom flowers open from rose-pink buds. Attractive felty new growth. Height 1.5m. Moist well-drained acidic soil in sun or part shade. Apr | |
| Rhododendron | yakushimanum | "Amity" | A compact variety with silver indumented new leaves and rose-opal to jasper red flowers. Height and spread 1m. Moist well-drained acid soil in part shade. Flowers during May. Good in pots. |
| Rhododendron | yakushimanum | "Blurettia" | Attractive variety with dark shiny leaves and wavy-edged rosy-purple flowers with a lighter centre. Height 1.5m. Moist well-drained acid soil in part shade. May. |
| Rhododendron | yakushimanum | "Flava Lachblatt" | An evergreen with deep green glossy leaves and yellow flowers with a red basal blotch. Height and spread 1m. Moist well-drained acid soil in part shade. Good in pots. |
| Rhododendron | yakushimanum | "Fred Peste" | Neat flat trusses of cardinal red flowers with spotted throats. Height 90cm. Acid soil in part shade. |
| Rhododendron | yakushimanum | "Golden Wedding" | A dwarf evergreen shrub with deep green lanceolate leaves and chrome-yellow flowers opening from red buds. Height and spread 1m. Moist well-drained acid soil in part shade. Flowers from April to May. |
| Rhododendron | yakushimanum | "Percy Wiseman" | Peachy-pink and cream flowers with a yellow throat.Height 1m. Moist well-drained acid soil in part shade. Good in pots. |
| Rhododendron | yakushimanum | "Silver Jubilee" | Glossy pale green leaves and large trusses of sparkling greenish white flowers with a crimson eye. Height 1.5m. Moist well-drained acid soil in part shade. May-June. |
| Rhododendron | yakushimanum | "Skookum" | A compact slightly spreading variety with dome-shaped trusses of strong red flowers with white filaments. Height 1.2m. Spread 1.5m. Moist well-drained acid soil in part shade. Flowers from April to May. |
| Rhododendron | yakushimanum | "Wally Miller" | Compact hybrid with pink flowers over silvery backed leaves. Height 90cm. Acid soil in part shade. Good in pots. |
| Rhododendron | yakushimanum | "Yaku Prince" | Attractive variety with dark green leaves and wavy-edged purplish-pink flowers with a paler blotch and dark orange-red spotting. Height and spread 1m. Moist well-drained acid soil in part shade. Flowers during May. |
| Rhodohypoxis | "Albrighton" | A small clump-forming alpine with keeled, greyish green hairy leaves and deep red-pink flowers. Height 10cm. Well-drained acid soil in sun. Jun.-Aug. Protect from winter wet. | |
| Rhodohypoxis | "Donald Mann" | A bulbous clump forming perennial with larger than normal crimson-red flowers. Height 10cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Douglas" | Bulbous clump forming perennial with crimson-red flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "E. A. Bowles" | Bulbous clump forming perennial with large mid-pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Emily Peel" | Bulbous clump forming perennial with large pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Eva Kate" | Bulbous clump forming perennial with wide leaves and narrow pointed petals of deep crimson red . Height 10cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Fred Broome" | Bulbous clump forming perennial with pale pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Garnett" | Bulbous clump forming perennial with narrow leaves and rounded petals of deep crimson red . Height 10cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Harlequin" | Bulbous clump forming perennial with smallish white flowers overlaid pale pink. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Kiwi Joy" | Bulbous clump forming perennial with double maroon-pink flowers that fade with age. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Margaret Rose" | Bulbous clump forming perennial with pale pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Monty" | Bulbous clump forming perennial with short hairy grey-green leaves and cerise red flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Perle" | Bulbous clump forming perennial with white, flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Picta" | Bulbous clump forming perennial with short hairy grey-green leaves and white, pink-edged flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Pinkeen" | Bulbous clump forming perennial with with keeled, greyish green hairy leaves and smallish mid-pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Ruth" | Bulbous clump forming perennial with small soft pink flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | "Stella" | A small clump-forming alpine with keeled, greyish green hairy leaves and clear mid-pink flowers. Height 10cm. Well-drained acid soil in sun. Jun.-Aug. Protect from winter wet. | |
| Rhodohypoxis | "Tetra-Red" | Bulbous clump forming perennial with short hairy grey-green leaves and pinky red flowers. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | baurii | "Alba" | A small clump-forming alpine with keeled, greyish green hairy leaves. Smallish white flowers ageing with a pink tinge. Height 10cm. Gritty lime free soil in full sun. Apr.-Sept. |
| Rhodohypoxis | baurii | "Lily Jean" | Bulbous clump forming perennial with double white/pale pink flowers. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. |
| Rhodohypoxis | deflexa | A diminutive species of this bulbous perennial with small red flowers. Gritty lime free soil in full sun. Jun.-Sep. | |
| Rhodohypoxis | milloides | Bulbous clump forming perennial with deep red flowers. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodohypoxis | milloides | "Claret" | Bulbous clump forming perennial with deep red flowers, larger than the species. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. |
| Rhodohypoxis | platypetala x milloides | A bulbous clump forming perennial with pale pink flowers that darken towards the tips.. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodoxis | hybrida | Bulbous clump forming perennial with white flowers and a yellow eye. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. | |
| Rhodoxis | hybrida | "Hebron Farm Cerise" | Bulbous clump forming perennial with deep cerise flowers and a yellow centre. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. |
| Rhodoxis | hybrida | "Hebron Farm Pink" | Dainty bulbous clump forming perennial with pink flowers and a yellow centre. Height 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. |
| Rhodoxis | hybrida | "Hebron Farm Red-eye" | Bulbous clump forming perennial with white flowers and a red centre, 8cm. high. Gritty lime free soil in full sun. Apr.-Sep. |
| Rhodoxis | hybrida | "Hebron Farm Rose" | Bulbous clump forming perennial with wide leaves and white flowers suffused with rose-pink and a yellow centre. Height 8cm. Gritty lime free soil in full sun. Apr.-Sep. |
| Ribes | laurifolium | An evergreen shrub with leathery dark green leaves and pendent cup-shaped, greenish yellow flowers. Height 1m. Spread 1.5m. Well-drained soil in sun. Flowers from February to March. | |
| Ribes | odoratum | An erect shrub with bright green leaves, turning red and purple in autumn. Fragrant, semi-pendent, yellow flowers followed by black fruit. Height 2m. Spread 2m. Well-drained soil in sun. Flowers from March to May. | |
| Ribes | sanguineum | "Brocklebankii" | A bushy shrub with bright yellow leaves becoming paler in summer. Pendent pale pink flowers in spring followed by blue-black fruits. Height 1.2m. Well-drained soil in part shade. March to May. |
| Ribes | sanguineum | "King Edward VII" | A compact, deciduous, upright shrub with clusters of dark red flowers followed by blue-black fruit. Height and spread 2m. Well-drained soil in sun. Flowers from March to May. |
| Ribes | sanguineum | "Pulborough Scarlet" | A compact, deciduous upright shrub with clusters of dark red flowers with a white centre followed by blue-black fruit. Height 3m. Spread 2.5m. Well-drained soil in sun.. Flowers from March to May. Prune after flowering. |
| Ribes | sanguineum | "Red Pimpernel" | A dwarf currant of upright growth and clusters of dark red flowers followed by blue-black fruits. Height 1.2m. Well-drained soil in sun. Mar.-May. |
| Ribes | sanguineum | "Tydeman's White" | A compact deciduous shrub with apple-green three-lobed leaves and long drooping racemes of white flowers. Height 2m. Spread 1.5m. Moist well-drained soil in sun or part shade. March to May. Prune after flowering. |
| Ribes | sanguineum | "White Icicle" | A deciduous shrub with apple-green three-lobed leaves and drooping racemes of white flowers. Height 3m. Spread 2.5m. Moist well-drained soil in sun or part shade. March to May. Prune after flowering. |
| Ribes | speciosum | An upright, semi-evergreen, spiny shrub with clusters of pendent, bell-shaped dark red flowers followed by bristly red fruit. Height 2m. Spread 2m. Well-drained soil in sun. Flowers from March to May. Fruits from June | |
| Ribes | x gordonianum | A spreading shrub with aromatic dark green leaves. Clusters of pendent flowers, red outside and yellow inside in early summer. Height 2m. Spread 2.5m. Well-drained soil in sun. June to July. | |
| Robinia | pseudoacacia | "Frisia" | A deciduous columnar tree with attractive yellow leaves, turning yellow-green in summer and orange-yellow in autumn. Pendent clusters of fragrant white flowers in early and mid-summer. Height 15m. Spread 8m. moist well-drained soil in sun. Protect from co |
| Robinia | x ambigua | A large deciduous shrub or small tree with large pinnate leaves on arching branches and drooping racemes of soft pale-pink flowers in early summer and sometimes again in autumn. Height 5m. Well-drained soil in sun or part shade. | |
| Rodgersia | henrici | A clump-forming perennial with bold, palmate crinkled green leaves. Upright stems of pinky-white starry flowers. Height 2m. Moist soil in sun or part shade. Jul.-Aug. Shelter from cold drying winds. | |
| Rodgersia | pinnata | A clump-forming perennial with crinkled dark green leaves.Stems of yellowish white, pink or red starry flowers. Height 1.2m. Moist soil in sun or shade. Jul.-Aug. | |
| Rodgersia | podophylla | A clump-forming perennial with bold, crinkled, glossy, green leaves, bronze when young and upright stems of creamy green starry flowers. Good autumn colour. Height 1.5m. Moist soil in sun or part shade. Jul.-Aug. | |
| Rodgersia | sambucifolia | A clump-forming perennial with hairy, dark green leaves, purple-bronze when young. Upright stems of white or pink starry flowers. Height 90cm. Moist soil in sun or shade. Jun.-Jul. | |
| Romanzoffia | unalaschcensis | A low growing perennial with rounded, scalloped glossy leaves and white flowers. Height 10cm. Moist soil in part shade. Mar.-Apr. | |
| Roscoea | "Beesiana" | A tuberous perennial with large mottled cream and purple-pink, orchid-like flowers. Height 40cm. Well-drained soil in part shade. Aug.-Sep. | |
| Roscoea | "Beesianum Album" | A tuberous perennial with cream, orchid-like flowers. Height 40cm. Well-drained soil in part shade. Aug.-Sep. | |
| Roscoea | cautleyoides | A tuberous perennial with dark green leaves and pale yellow,orchid-like flowers Height 30- 50cm. Moist well-drained soil in part shade.Jun.-Aug. | |
| Roscoea | cautleyoides | "Jeffrey Thomas" | A tuberous perennial with dark green leaves and pale yellow,orchid-like flowers, the hood being darker than the bottom lip. Height 30- 50cm. Moist well-drained soil in part shade.Jun.-Aug. |
| Roscoea | purpurea | A tuberous perennial with deep green leaves and purple orchid-like flowers in early and mid-summer. Height 40cm. Well-drained soil in part shade. Jun.-Jul. | |
| Roscoea | purpurea | "Tall Selection" | A tuberous perennial with deep green leaves and exceptionally large light purple orchid-like flowers. Height 40cm. Well-drained soil in part shade. Aug.-Sept. |
| Rosmarinus | officinalis | An aromatic shrub with leathery, narrow grey-green leaves. Pretty purple-blue to white flowers. Height 1.5m. Well-drained soil in sun. Mar.-Jun. | |
| Rosmarinus | officinalis | "Benenden Blue" | An aromatic, evergreen shrub with leathery, narrow dark green leaves and pretty vivid blue flowers. Height 1.5m. Well-drained soil in sun. Mar.-Jun. and again in Sept. if trimmed after first flush. |
| Rosmarinus | officinalis | "Green Ginger" | An aromatic shrub with leathery, narrow, grey-green, ginger scented leaves. Pretty lavender-blue flowers. Height 1m. Well-drained soil in sun. Mar.-Jun. |
| Rosmarinus | officinalis | "Lady in White" | An aromatic, evergreen shrub with leathery, narrow dark green leaves and pretty white flowers. Height 50cm. Well-drained soil in sun. Mar.-Aug. |
| Rosmarinus | officinalis | "McConnell's Blue" | An aromatic, evergreen shrub with leathery, narrow dark green leaves and pretty blue flowers. Height 80cm. Well-drained soil in sun. Mar.-Aug. |
| Rosmarinus | officinalis | "Miss Jessopp's Upright" | An aromatic evergreen shrub with leathery, narrow leaves. Pretty purple-blue to white flowers from May-Jun. Height 1m. Well-drained soil in full sun. |
| Rosmarinus | officinalis | "Roseus" | An aromatic evergreen shrub with leathery, narrow dark green leaves and pretty pink flowers. Height 80cm. Well-drained soil in sun. Mar.-Aug. |
| Rosmarinus | officinalis | "Sissinghurst Blue" | An aromatic, evergreen shrub with leathery, narrow dark green leaves and pretty dark blue flowers. Height 60cm. Well-drained soil in sun. Mar.-May. |
| Rubus | "Benenden" | A spreading deciduous shrub with dark green, lobed leaves. Pretty saucer-shaped white flowers cloth the arching branches. Height 3m. Spread 3m. Well-drained soil in sun. May to June. | |
| Rubus | "Betty Ashburner" | A prostrate evergreen shrub with arching stems and heart-shaped, glossy, mid-green leaves and pretty saucer-shaped white flowers. Height 30cm. Spread Indefinite. Well-drained soil in sun or part shade. Flowers from June to August. | |
| Rubus | arcticus | A dwarf bramble with relatively large pink flowers. Apr.-May. Height 10cm. Well-drained soil in sun or part shade. Apr.-May. Good autumn colour. | |
| Rubus | henryi var bambusarum | An evergreen climber with spiny stems and glossy, divided, bamboo-like dark green leaves. Clusters of cup-shaped pink flowers in summer followed by black fruit. Height 6m. Well-drained soil in sun or part shade. Flowers from June to August. | |
| Rubus | irenaeus | A low growing prostrate evergreen shrub with silvery rose-like flowers followed by raspberry-like fruit in autumn. Attractive relatively large rounded silvery-green leaves. Well-drained soil in sun or part shade. Flowers from March to April. | |
| Rubus | lineatus | A shrub with rambling, silky-hairy stems and dark green leaves, silver underneath with conspicuous veining. Small clusters of white flowers in spring, followed by small red or yellow fruits. Height 1m. Spread 1m. Well-drained soil in sun. | |
| Rubus | microphyllus | "Variegatum" | A small suckering shrub with dense mounds of slender glaucescent, prickly stems. Relatively large lobed green leaves mottled cream and pink. Prune hard in spring. Well-drained soil in part shade. |
| Rubus | odoratus | A thicket-forming shrub with velvety, green, palmate leaves. Pretty cup-shaped purple-pink flowers from early summer to early autumn, followed by edible red fruit. Height 2.5m. Spread 2.5m. Moist well-drained soil in sun or part shade.. Flowers from June | |
| Rubus | spectabilis | "Olympic Double" | A thicket-forming shrub with glossy, dark green leaves pretty double, bright purple-pink flowers. Orangy egg-like fruits. Height 2m. Well-drained soil in sun. Apr.-May. Deciduous. |
| Rubus | taiwanicola | An alpine shrub with suckering mats of pinnate foliage and relatively large white flowers followed by small red fruits. Height 15cm. Well-drained soil in sun. Jun.-Aug | |
| Rudbeckia | "Goldquelle" | A clump-forming perennial with deep green incised leaves and pretty bright double lemon-yellow flowers. Height 90cm. Moist well-drained soil in sun. Jul.-Oct. | |
| Rudbeckia | "Takao" | A clump forming perennial with deep green leaves and small, golden yellow daisy flowers with a black centre. Height 70cm. Well-drained soil in sun or part shade. Jul.-Oct. | |
| Rudbeckia | fulgida var. deamii | A clump-forming herbaceous perennial with hairy stems and mid-green leaves. Bright orange-yellow daisy-like flowers with a blackish brown centre. Height 60cm. Well-drained soil in sun or part shade. Aug.-Oct. | |
| Rudbeckia | fulgida var. speciosa | A clump-forming perennial with mid-green leaves and bright orange-yellow daisy-like flowers with a blackish brown centre. Height 90cm. Well-drained soil in sun or part shade. Aug.-Oct. | |
| Rudbeckia | fulgida var. sullivantii | "Goldsturm" | A clump-forming perennial with golden yellow daisy-like flowers with a blackish brown centre. Height 60cm. well-drained soil in sun or part shade. Aug.-Oct. |
| Rudbeckia | laciniata | An herbaceous perennial with deeply lobed leaves and loose clumps of stems carrying bright yellow flowers with a brownish conical centre. Height 1m. Moist well-drained soil in sun. Jul.-Oct. | |
| Rudbeckia | laciniata | "Juligold" | A clump forming perennial with deep green cut foliage and stiff stems carrying large reflexed golden yellow flowers with raised green central cones. Height 1.8m. Moist well-drained soil in sun. Jul.-Aug. |
| Rudbeckia | maxima | Broad glaucous leaves with light gold flowers with black centres. Height 75cm. Well-drained soil in sun or shade. Jul.-Sep. | |
| Rudbeckia | occidentalis | "Green Wizard" | A clump-forming herbaceous perennial with mid-green leaves. Curious flowers of black cones with small green sepals and no petals. Height 1.2m. Well-drained soil in sun or part shade. Aug.-Oct. |
| Rudbeckia | occidentalis | "Green Wizard" | A clump-forming perennial with mid-green leaves. Curious flowers of black cones with small green sepals and no petals. Height 1.2m. Well-drained soil in sun or part shade. Aug.-Oct. |
| Rudbeckia | paniculata | A clump forming perennial with broad deeply cleft leaves and lemon-yellow daisy flowers with a prominent central cone. Height 90cm. Moist well-drained soil in sun. Jul.-Aug. | |
| Rudbeckia | subtomentosa | A clump forming perennial with stems of butter-yellow daisy flowers with brownish centres. Height 1.2-1.5m. Moist well-drained soil in sun or part shade. Aug.-Oct. | |
| Rudbeckia | triloba | An upright herbaceous perennial with branched stems of lobed ovate leaves and heads of yellow daisy flowers with a dark centre. Height 1.5m Well-drained soil in sun or part shade.Jul.-Oct. | |
| Ruscus | aculeatus | "John Redmond" | A form of our native, evergreen subshrub with upright stems of spiny tipped dark green leaves. Self-fertile, the inconspicuous greenish white flowers are followed by showy red berries. Height 50cm. Spread 75cm. Moist well-drained soil in sun or part shad |