Toona sinensis seed is the seed of Toona sinensis, which usually matures in September. There are many seeds in the fruit of Toona sinensis, including triangles, semicircles and diamonds. The seed is flat on one side, slightly protruding from the center on the other side, 5-7 mm long, with reddish-brown peel and membranous wings at one end.

Toona sinensis likes temperature, which is suitable for cultivation in areas with average temperature of 8- 10℃, and its cold resistance increases with seedling age. One-year-old seedlings planted directly may be frozen at about-65438 00℃. Toona sinensis likes light and is more resistant to moisture. It is suitable for growing in fertile and moist soil around rivers and houses, and sandy loam is generally better. The suitable soil pH value is pH 5.5-8.0.

Distribution: Native to central and southern China. It is cultivated in the northeast from southern Liaoning, west to Gansu, north to southern Inner Mongolia, south to Guangdong and Guangxi, and southwest to Yunnan. Among them, Shandong, Henan and Hebei are the most planted.

Xinyang, Henan Province has a large area of artificial forests. Qinling Mountains in Shaanxi and Xiaolongshan Mountains in Gansu are naturally distributed. It is vertically distributed in mountainous areas and vast plains below the altitude of 1500m, with the highest altitude of 1800m and the cold-resistant position of 6- 1 1.