The planting time is before spring germination (before the end of March). Planting seedlings, choose fine varieties such as brown Toona sinensis, red Toona sinensis, and red-bud green cedar. Before sowing, apply all or strips with a depth of 0.4-0.8m, combine with soil preparation, apply base fertilizer, and apply 5000- 10000 kg of decomposed miscellaneous fertilizer and calcium superphosphate 1000 kg per mu. The greenhouse was built in 65438+early February, when the trees began to shed their leaves. The scaffolding material of plastic shed is plastic pipe or steel bar, and the four sides and roof of the shed are covered with plastic film. The whole greenhouse is arched, with a height of 2.5 meters in the middle. The methods of heating in plastic greenhouses include building stoves, covering straws, and using donkey and horse manure as a hotbed for heating. Greenhouse management The temperature in the plastic greenhouse of Toona sinensis buds should be kept above 65438 05℃, and the temperature difference between day and night should be controlled at about 65438 00℃. After the relative humidity of the air is kept at 65% for 20-30 days, the Toona sinensis tree can germinate. After germination, the temperature in the greenhouse is controlled at 20℃, and after 20 days, the accumulated temperature above 5C reaches 200℃, and the bud is about 20cm long, so it can be picked. At this time, before and after the Spring Festival, the first crop of Toona sinensis buds can be listed.