50cm
Steel blue flower heads with attractive showy spiky foliage. flowers July to August. Sow February to March in cold frame.

Sowing Information
Common/Latin Name: Sea holly
Type: Hardy Perennial
Temperature: 15-20°C
Cover: Average layer of vermiculite
Date: Sow March to June
Advice: E. superbum & E. alpinum a cold germinator 4°C for 6-8 weeks then 15-20°C Or sow in a cold frame Feb to March. Germination slow and erratic.