It’s because the temperature is not suitable.

The second crop of Toona sinensis is not red because the temperature is not suitable. Unsuitable temperature will cause the plant to develop poorly and not be red. The greenhouse temperature needs to be between 20 and 30 during the day, and the greenhouse temperature at night needs to be between 20 and 30. Control it between 5 and 7 degrees. The temperature difference is an important condition to ensure the quality and color of toon.

Good lighting is also an important condition for the quality of toon. In winter, the light transmittance of the greenhouse film must be ensured, and the floating soil on the greenhouse film must be cleaned up in time. The floating soil must be cleaned after 10 a.m.