Sold in 7cm pots.
Mexican Snowball. A very hardy succulent with tightly packed, silvery-blue leaves, producing pink tips in strong sunlight. Clump-forming, producing offsets readily.
Care requirements: Can be planted out or grown in pots. Provide a good free-draining soil. Grow in full sun or partial shade. Water as soil becomes dry, during the growing season, and feed with a suitable succulent feed. Water very sparingly / if required during winter. 
Hardy to -5c