This plant is very hardy, and lives outside all year round. The clump is currently 460mm across, and the largest head is approx 150mm in diameter.
Lovely plant CP. Are you going to show us the plant when the flowers open fully????
Sorry Dawn, I took this pic towards the end of the day when I got home from work and the flowers were closing, the next day they were finished so I missed them, I'll have to wait until next year now to sse them and get another pic.