Helianthemum nummularium Plant Data Family Name: Cistaceae Common Name: rock rose Other Name(s): Helianthemum nummularium Hardiness Zones: Zone 5: (-29 to -23 C) Plant Code: henu Flowering Time: May, Jun, Jul, Flowering Color: Yellow, Red, White, Pink, Leaf Form: 5 PlantSomething BC Garden Centre Listings No members have selected this plant.