Sowing Temperature : 20-25C Growing Temperature : 18-40C Grow up / Flower days :80days Height when grow up : 15-20CM 1 , Sun : cactus requires sunny , often a long time on the indoor cactus , lack of sunlight , it will not bloom . Cactus to warmer ambient conditions , if the ambient temperature of more than 20 degrees will not bloom . 2 , Watering: Watering must not be more than , hurried to make Pentu too wet , it should be rather dry and not wet . Especially in winter and summer dormancy , but should moderate watering. 3 , fertilization : cactus barren and drought -resistant , although , in the case of both the drought and lack of fertilizer is not easy to blossom. Therefore, the cultivation should be given appropriate fertilizer , applied once the growing season to half thin maturity of the cake every 10 days . Fertilization is also not excessive, will lead to excessive flowering . 4 , small environment : Note to cactus to create a proper temperature and humidity of the local environment , such as on a windowsill to make an enclosed shed with plastic film , which will be placed cactus conservation , not only grow faster, and the bright color, are more likely to flowering.