Not a traditional desert cactus and requires soil to be kept moist but not soggy. Overwatering causes floppy stems and leaves whereas under-watering causes leave and stems to shrivel.
In October, to promote flower bud formation, do not water. Water in November until the plant has finished blooming (end of January or so). Once finished, withhold water for six weeks. Top with new, well-draining soil or repot during this time. Resume watering after six weeks, keeping the soil evenly moist without making it soggy. Allow top to dry between waterings.
