Light is one of the basic requirements for plants. To achieve this, keep the plant inside the house, near a window through which a lot of light streams in. The amount for light needed differs in different cactus, for example, Christmas cactus needs bright sunlight. Most cactus need a dry environment. They can tolerate temperatures between 45 to 80º F. The area where they are kept should be well-ventilated. Maintain a dry and low humid air around the plants. Cactus can get infected by pests very easily. For pest-control, change the soil of the plant on a regular