One of the most popular hoya varieties, Hoya carnosa compacta, is known for its curled, fleshy leaves that grow in long rope-like vines. To care for Hoya carnosa compacta use a fast-draining mixture of potting soil. Water once the top 2-3 inches of the soil are completely dry and provide bright indirect light. A daytime temperature of 70°F (21°C) or above is ideal. The perfect humidity is between 40-60%