The top cactus of the moon cactus has a mutation that causes it to lack the chlorophyll that makes the cactus green. This mutation exposes the red, orange or yellow color beneath. Cactus that lack chlorophyll cannot live on their own
Like most cacti they're drought tolerant and need very little care and attention to grow well. Not enough sunlight and over-watering are common mistakes.
The moon cactus plant requires bright indirect sunlight. Full sun will actually harm this container plant, so keep it out of direct sunlight for long periods of time.
It is an excellent plant for garden rockery settings, desert type landscapes, patios and botanical gardens
For watering cacti, the golden rule is to make sure the soil is completely dry before watering! This will stop the roots from rotting. It is advised to always use a pot with a drainage hole so that excess water can get drained out. If kept in a sunny area, you will need to water it once every week. If it is in a semi shaded or filtered light area, you might need to water it once in 2 weeks.
Cacti like soil that is well aerated and fast draining. You can fertilise the cactus in the summer months when it is in its growing season. During the winters it is best to cut back on any fertiliser and let the plant rest.