For optimal growth, string of pearls require well-draining soil that mimics their natural habitat. A cactus soil mix comprising perlite, pumice, and organic matter provides excellent drainage and aeration, preventing root rot. Enhance the soil with bone meal or fertilizer to boost fertility. Maintain a neutral pH range between 6.0 and 7.0 and water sparingly, allowing the soil to dry thoroughly before rewatering. Choose terracotta pots with drainage holes to prevent waterlogging.