how often should you water your cactus
When and How Often to Water. Water your Christmas cactus when the top inch of the soil is dry. Always take into consideration the climate and time of year. If your cactus is outdoors in a hot, dry climate, you might need to water every two to three days, especially if the plant has been in the sun.
After you plant the cactus give it a small amount of water every couple weeks if it doesn't rain, for about a month then let nature take it course. Feed the plants about once a year. With a dilute solution 10-10-10- or a good plant food.