Last month I bought Huernia hystrix and H. zebrina. The hystrix has started to develop new flower buds, which seem to be developing up to a point and then shriveling and dying off. The plants are currently indoors and only get about an hour of direct sunlight very early in the morning. This sunlight is not enough to hurt the plants, because my Phalaenopsis orchid also seems to be liking it (no signs of sunburn for the 4 months I had the phal). I live in South Africa. Right now it is summer, but it is not hot enough for the plants to be suffering (end of summer, approaching autumn). What could be the cause of the buds dying off? Is there anything I can do? The medium is very well draining and I water very carefully. Your help is greatly appreciated!