Sulphur Cosmos
Cosmos sulphureus
Sulphur Cosmos is an annual for focal point, mid-border, suited to full sun to partial shade and clay or loam, flowering Jun, Jul, Aug, Sep.
| Type | Annual |
|---|---|
| Mature height | 120 cm |
| Spread | 45 cm |
| Aspect | full sun to partial shade |
| Foliage | Deciduous |
| Hardiness | USDA 3a-10b, RHS H7 |
| Pollinator-friendly | Yes |
| Pet-safe | Yes |
Where to use it in a border
At around 120 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 45 cm of room to spread, roughly 2 to the metre when planted in a drift. It is hardy across USDA zones 3a to 10b and rated H7 by the RHS, so check it suits your area before planting.
It appears in our lists of full sun, clay soil, pollinator-friendly plants, pet-safe plants.
Border Builder uses Sulphur Cosmos'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
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:
- Allium 'Purple Sensation'to flower when it does not
- American Cranberrybush 'Redwing'for height behind it
- American Wisteria 'Amethyst Falls'for height behind it
- Angelita Daisyto edge in front
- Apple 'Bramley's Seedling'for height behind it
- Apple 'Cox's Orange Pippin'for height behind it
Garden styles
Sources
Bloom timing and hardiness drawn from: