Plant List Z
| Zaluzianskya | ovata | Scented white flowers with a red reverse in spring and summer. They open at night. Height 20cm. Possibly hardy but best in Alpine house. | |
| Zantedeschia | aethiopica | "Crowborough" | A clump-forming perennial with semi-erect arrow-shaped, glossy green leaves. Produces large, pure white spathes. Height 90cm. Moist soil in sun. May-Jul. |
| Zantedeschia | aethiopica | "Glow" | A clump-forming perennial with semi-erect arrow-shaped, glossy green leaves. Produces large, thick textured, white spathes flushed pink. Height 60-75cm. Moist soil in sun. May-Jul. |
| Zantedeschia | aethiopica | "Green Goddess" | A clump-forming perennial with semi-erect arrow-shaped, dull green leaves. Produces bright green spathes with a white centre. Height 90cm. Moist soil in sun. May-July. |
| Zantedeschia | aethiopica | "Mr. Martin" | A large flowered form of the "Arum Lily" Flowers Apr.-Jul. Will grow anywhere. Height 75cm. |
| Zantedeshia | aethiopica | "Kiwi Blush" | A clump-forming perennial with semi-erect arrow-shaped, glossy green leaves. Produces large, white spathes flushed pink. Height 60-75cm. Moist soil in sun. May-Jul. |
| Zauschneria | californica | "Albiflora" | A woody-based perennial with hairy, grey-green leaves and tubular, white flowers. Height 25cm. Well-drained soil in sun. Some protection in winter. Jul.-Oct. |
| Zauschneria | californica | "Dublin" | A woody-based perennial with hairy, grey-green leaves and tubular, bright red flowers. Height 25cm. Well-drained soil in sun. Some protection in winter. Jul.-Oct. |
| Zauschneria | californica | "Olbrich Silver" | A woody-based upright perennial with hairy, grey leaves and tubular, bright red flowers. Height 25cm. Well-drained soil in sun. Some protection in winter. Jul.-Oct. |
| Zauschneria | californica | "Western Hills" | A woody-based perennial with hairy, grey-green leaves and tubular, bright scarlet flowers. Height 40cm. Well-drained soil in sun. Some protection in winter. Jul.-Oct. |
| Zauschneria | californica ssp. garrettii | Compact dwarf shrub with greyish-green hairy leaves and orange-red tubular flowers. Height 30cm. Well-drained soil in sun. Jul.-Sep. Prune in spring. | |
| Zauschneria | californica ssp. latifolia | Compact dwarf shrub with silvery-green hairy leaves and scarlet-red tubular flowers. Height 30cm. Well-drained soil in sun. Jul.-Sep. Prune in spring. | |
| Zenobia | pulverulenta | A spreading semi-evergreen shrub with arching branches of glossy, blue-green leaves and upright spikes of pendent, bell-shaped, scented white flowers. Height 2m. Spread 1.5m. Moist well-drained acid soil in sun or part shade. Flowers from June to July. Pr | |
| Zephyranthes | candida | A bulbous perennial with thin green leaves and a succession of pure white flowers.Height 15-20cm. Well-drained gritty soil in sun. Jun.-Sept. | |
| Zephyranthes | minima | Grass-like foliage and tiny white flowers with a pink-red reverse. Height 8cm. Well-drained soil in sun. Best in Alpine House. Aug.-Oct. |