Cacti are drought-tolerant plants and don't require frequent waterings. The best way to water a cactus is using the "soak and dry" method by allowing the soil to dry out completely and then give it a thorough soak to evenly and thoroughly saturate the soil.
During the growing season, you may see yourself watering a Cactus weekly if they are in smaller containers that are 3" in diameter or smaller, or every 2-3 weeks for those in larger containers. Reduce watering during the winter months. You can utilise a moisture meter to help you properly gauge soil moisture and avoid overwatering.
Humidity
Cacti prefer low humidity levels, so it's best to keep them in a dry environment. Avoid placing them in a bathroom or other area with high humidity, as this can cause fungal diseases to develop or the soil to remain moist for too long.
Temperature
Cacti prefer warm temperatures, between 60°F and 80°F (16°C to 27°C). They can tolerate cooler temperatures in the winter, but should be kept away from drafts and sudden temperature changes.
Soil
Cacti require well-draining soil that is low in nutrients. You can use any standard cactus potting soil that is well-draining. Cacti are susceptible to root rot if they are planted with a standard potting mix or garden soil which retains moisture and has a higher level of nutrients.
