A greenhouse in winter?

How flowers overwinter in the greenhouse;

1. The potted flowers suitable for overwintering in the cold room include camellia, rhododendron, bamboos, Michelia, Zhu Dinghong and so on. With a little protection at low temperature, you can safely hibernate. After entering the shed, pay attention to ventilation and cooling in sunny days, and don't break the dormancy. Chrysanthemum, primrose, calceolaria, cyclamen, calla lily, etc. It should be kept at 15℃ ~ 20℃ during the day. If the temperature in the shed is too high, it should be ventilated and covered with heat preservation at night. If the temperature is too low, the temperature should be raised to about 5℃ and not lower than 0℃.

Second, the flowers suitable for overwintering in greenhouses mainly include cactus, pineapple, deciduous wood, Brazilian iron, rich trees and other flowers.

(1) The greenhouse is covered with thermal insulation materials to prevent heat loss at night.

(2) A simple shed is set in the greenhouse, and the distance between two layers of plastic films is about 10 cm, so that the heat preservation effect is better.

(3) heating up. Electric heating or boiler heating consumes a lot of energy and costs a lot. Combining the first two measures, it can be applied in extremely low temperature and rainy and snowy days for a short time. When the temperature in the shed reaches 25℃, pay attention to ventilation on sunny days and stay dormant for the winter. In addition, the air humidity in the greenhouse is high, so it is necessary to strengthen the prevention and control of fungal diseases such as black spot and powdery mildew. Flowers that overwinter should stop fertilizing, control watering, keep semi-arid state, and prevent rotten roots and dead seedlings. Flowers growing in greenhouses should also be watered moderately and ventilated frequently so that they can thrive.