Cacti usually need direct or filtered sunlight to perform photosynthesis. Natural light can be supplemented by an artificial light source such as fluorescent lighting. Soil Mixture Cacti have adapted to survive in solid clay and pure sand, with limited nutrients. However, to grow more healthier cacti, they should be grown in a soil or potting mixture which provides free-draining and retains moisture. Always use a gritty mixture to harbor pests and diseases, and to ensure correct drainage.
Most cacti prefer a slightly acidic soil.
Pots and Containers Mostly shallow-rooted succulents and cacti do not require a great depth of soil. Otherwise, use half pots, known as pans, which are 3-6 in. Make sure that all outdoor containers have drainage holes and line the bottoms with material such as turface or gravel. When growing plants together in one container, select plants with similar cultural needs and growing seasons. Buying and Selecting Cacti and Succulents Supermarkets, garden centers, and florists generally stock cacti and succulents that are easy to grow.