Eight-year-old seedlings are too old and have many repetitions. Generally speaking, trees are very big and difficult to grow.

To buy seedlings, one-year-old seedlings, two-year-old seedlings and three-year-old seedlings are generally selected.

Seedling selection mainly depends on the number of fibrous roots, the thickness of fibrous roots, the thickness of branches, whether the bud eyes are full and whether there is germination.

Bai Olin, I have never planted it, and I have never heard of it. All I know is that there is black Olin.

Promote its growth during the growing season. After the leaves fall in autumn, they should be pruned according to the cultivation frame and the predetermined shaping method, and buried in winter to prevent cold. Unearthed in spring, put on shelves, bud-smeared and fixed, then sparse inflorescence, pick core, secondary twig management, ear shaping, book grain, water management, timely harvesting and so on.