Hen and Chicks require gritty, fast-draining soil and thrive in full hot sun. They will even grow well in pure gravel. If planting outside, even old hard clay will be just fine if mounded so it will have good drainage. Bark or wood chips is not recommended, because they can rot the plants. The neat rosettes multiply freely by runners that form dense colonies. Flowering rosettes die after bloom time, but are quickly replaced. Most Sempervivums are quite frost resistant and very easy to grow outside in rock gardens, planters and troughs. Sempervivums also do well in cracks in dry stone walls and in rock gardens.