How many years does it usually take for osmanthus trees to grow to 20 cm in diameter?

Osmanthus fragrans grows very slowly, 20cm is estimated to be more than 40 years.

If we want to cultivate osmanthus trees directionally, we should start pruning at the seedling stage of osmanthus fragrans, that is, 1 2 years. In the early stage of seedling stage, the trunk is mainly cultivated. It can grow freely in the first and second years, leaving upright branches as the main branches and branches and side branches as auxiliary branches.

In the third year, when the seedlings of osmanthus fragrans grow to the height of 1 m-1.5 m, the fixed branches should be knocked out to let them grow new branches. Branches and lateral branches in the middle and lower part of the trunk of osmanthus seedlings were all cut off. A single-stem osmanthus tree has only one trunk, and a cluster osmanthus tree has multiple trunks. The middle and upper branches and lateral branches of the trunk can be selected according to the height of the trunk.

Extended data In Cheliaoba Village, Shengjiaba Township, Enshi City, Hubei Province, a wild "Guihua Shuwang" was found, with a height of 16m, a crown width of 17m and a trunk diameter of 102cm. This osmanthus tree is over 360 years old. From a distance, the tree king looks like a big umbrella. The branches around it extend to the ground, and the leaves are very lush, completely blocking the internal scene.

In Shui Sheng Temple in Nanzheng County, Hanzhong City, southern Shaanxi Province, there is an oldest osmanthus tree. According to legend, this osmanthus tree was planted by Xiao He, the minister of Emperor Gaozu Liu Bang, in the early years of the Western Han Dynasty (206 BC), so it was called "Han Gui". According to scientific determination, the age of the tree is 1840 350 years.