A large herbaceous perennial, sunflower-like, with oval leaves forming a leafy clump. In autumn, from green buds, open typical aster-like yellow flowers. From the south east of North America, preferring full sun, in a average, well drained soil. Could benefit from a Chelsea-chop, to reduce its overall height, otherwise suited to the back of middle of a border.
Silphium gracile
Slender rosinweed
Details
| Aspect | Sun or part shade |
| Flower Colour | Yellow |
| Flowering Period | Aug | Sep |
| Foliage | Not evergreen |
| Goes Well With | Nepeta, Symphyotrichum, Grasses |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 2m |
| Soil | Most types |
| Spread | 2m |
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