One of the more difficult species to grow long enough to produce clumps. Watering Needs Need regular water but do not water again until dry. as it is specially sensitive to over watering; plants should be allowed to become crowded in their pot. Keep in shallow pot.Also, it is a species that is dormant in the winter and require very little water (maybe even none) during the cold months. Frost Tolerance: Light frost protection required. Minimum of 5ºC for safe growing (but hardy up to -5°C or less).