How To Care For Red Moon Cactus. The top cactus is usually drained of its chloryphll and cannot create its own food thus it uses the bottom. Fertilizing - The Moon Cactus only needs to be fertilized when it is actively growing April - September.
Repotting - Use cactus soil or a 5050 combination of regular potting mix and sand. Put the cactus in a warm sunny place. Whether planting a solitary plant in its own pot or mixing it with other succulents always grow your moon cactus in fast-draining succulent soil.
Like with any other succulent over-watering is the quickest way to kill your plant.
Fertilize monthly during spring and summer to grow a healthy colorful cactus. Wait for the potting soil to dry out completely and gently take the cactus out of the pot. Any standard plant fertilizer can be used. Saving A Moon Cactus - My roommate was trying to help me care for my indoor garden and without me knowing about it was watering.