Rosinweed
Silphium integrifolium
Rosinweed is a perennial for focal point, mid-border, suited to full sun and clay or loam, flowering Jul, Aug, Sep.
| Type | Perennial |
|---|---|
| Mature height | 150 cm |
| Spread | 75 cm |
| Aspect | full sun |
| Foliage | Deciduous |
| Hardiness | USDA 4a-8b |
| Pollinator-friendly | Yes |
| Pet-safe | Not confirmed |
Where to use it in a border
At around 150 cm, it sits best toward the back of a border, or on its own as a focal point with room around it. Give it about 75 cm of room to spread. It is hardy across USDA zones 4a to 8b, so check it suits your area before planting.
It appears in our lists of full sun, clay soil, pollinator-friendly plants.
Border Builder uses Rosinweed's height, spread, soil, bloom months and companions to place it in a full border plan for your own conditions, on iPhone and iPad.
Flowering through the year
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Worth knowing
- Its flowers are valued by bees and other pollinators.
Good companions
Plants that share its conditions and style, chosen to complement its place in the border:
- Aromatic Asterto edge in front
- Blanket Flower 'Arizona Sun'to edge in front
- Blanket Flower 'Goblin'to edge in front
- Chokecherryfor height behind it
- Giant Ironweedfor height behind it
- Golden Alexandersto edge in front
Garden styles
Sources
Bloom timing and hardiness drawn from: