From the drier, western US states, comes this promising drought-tolerant perennial. Very narrow foliage, topped by intricate white flowers. Favoured by butterflies. Hardiness is likely affected by excessive cold and wet over winter. Site in well drained soil, full sun, in a sheltered position.
Asclepias subverticillata
whorled milkweed
Details
| Aspect | Full sun |
| Flower Colour | White |
| Flowering Period | Jun | Jul | Aug |
| Foliage | Not evergreen |
| Goes Well With | Santolina, Penstemon, Pseudodictamnus |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 1.2m |
| Soil | Light, well-drained |
| Spread | 50cm |
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