Cacti and succulents need a porous and quick draining mixture to thrive such as a mix that has three basic ingredients: sand, potting mix, and pumice. These particles interact with water and provide nurtrients to the roots. The porosity of the soil is essential to maintain a healthy plant, to prevent roots from rotting, and to allow the plant to absorb the water. You can simply combine some clean sand with potting mix or purchase prepared cactus mix, which is sold at most garden centers and nurseries. Cacti 101 has a soil mixture made exclusively for our plants. You can purchase it online at our online store.