From an elegant clump of dark-green ovate leaves, stems to around 1.5m tall show off pale yellow flowers emerging from apple-green calyces. From central USA, typically growing in drier conditions, but with more moisture it may get to 2m tall.
Silphium wasiotense
Details
| Aspect | Full sun |
| Flower Colour | Yellow |
| Flowering Period | Jul | Aug | Sep |
| Foliage | Not evergreen |
| Goes Well With | Nepeta, Geranium, Grasses |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 1.5m |
| Soil | Most types |
| Spread | 80cm |
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