When should potted white orchids come into the room? Can it blossom in winter?

White orchids, commonly known as orchids, are native to subtropical regions, like humid, warm and semi-shaded environment, and belong to acidic flowers and trees. Potted plants are often planted in Northeast, North China and Northwest China, and should be moved into the strong light in the greenhouse before frost (when the temperature is lower than 6 ℃). Applying alum fertilizer twice before entering the house can still blossom under the condition of more than 18 ℃ in daytime and no less than 10 ℃ at night. Under family conditions, the potted soil should be dug around before entering the house, and applied with 0.2% cake alum powder fertilizer, sprinkle thinly, and return to the original soil. Then put the balcony or indoor sunshine, adhere to the noon spray to wash leaves, if the temperature is suitable, can also blossom. When the air humidity is relatively insufficient, it is necessary to observe whether there are scale insects and mites.