Sempervivum is the perfect plant for hot dry locations as well as being very adaptable to soil types, although performing their best in a gritty soil. Plant them close together about 4 inches apart since they are very slow growing. Once established you will need to pull out the faded rosettes of the 'hens' in order to allow the chicks to fill in. It's easy to pull off the chicks anytime during the season and begin to fill in cracks or crevices or use in planters on a hot, dry deck. If plants begin to rot, you need to provide better drainage