Bedroom is not recommended to put too many plants, the general plant is the daytime light and action is stronger than respiration, put out more oxygen; but at night respiration is stronger than the light and action, consume more oxygen, and people compete for oxygen. Cactus, aloe plants and this role is just the opposite, the night put out more oxygen than during the day, so you can put these two types of plants. In addition, from the feng shui point of view cactus plants too many spikes on the homeowner is not favorable, if you believe that it is best not to put.