Repot into a container only slightly larger than the present one. Repotting into a container too large may lead to a tendency to overwater. Set the plant in the new container at the same level it was originally growing and fill around it with damp soil. Wait several days before watering so damaged roots will have time to heal. Fertilizer Like other types of house plants, cacti need fertilizer, but in smaller amounts.
Excess nitrogen can cause succulent growth, leading to insect, disease and other problems.
Time-released fertilizers also can be used, but need only be applied once in the spring. Do not fertilize newly repotted plants, unrooted plants, or plants going through a dormancy period. Light Most arid species of cacti require bright sunlight to grow well. Windows facing south provide the most sunlight, while windows facing east and west usually offer some direct sun for at least part of the day. In some homes, artificial light may be necessary to supplement natural light.