Sempervivum 'Mona Lisa' (Smits): A much-loved webbed variety. This green rosette can turn pink to brick red and each mother plant produces a circle of new offsets on short stolons at its base. As it grows it develops into a dense, mounding colony. Hens & Chicks need plenty of outdoor sunlight to show their best colors and maintain a tight rosette form. They thrive in gritty, well-draining soils and pots with drainage holes. They produce new offsets or "chicks" on stolons. These chicks can be left to form tidy clusters or removed to share and transplant. Sempervivum do most of their growing in the spring and summer, and will thrive with weekly watering and afternoon shade if temperatures exceed 80F. They are incredibly frost hardy and will happily overwinter under a blanket of snow. Protect from heavy rains and standing water to prevent rot.