Helianthemum nummularium 'Buttercup'
Rock Rose, Sun Rose
Family: Cistaceae Rock Rose
| Type | Perennial, groundcover |
| USDA Hardiness range | 5A - 10B |
| Exposure | Full sun |
| Bloom color | Yellow |
| Bloom time | Early Summer to Early Fall |
| Water needs | Moist |
| Landscape uses | Border, ground cover, rock garden |
| Height | 6" to 12" / 15cm to 30cm |
| Spread | 24" to 36" / 60cm to 90cm |
| Growth rate | Moderate |
| Persistence | Evergreen, broadleaf |
| Leaf color | Green |
| Fruit color | n/a |
| Soil pH requirements | Neutral, slightly alkaline |
| Soil type | Loamy |
| Form | Upright or erect |