1. Light repair: for some plants with weak root growth and good growth status, it is generally not necessary to repair roots in a large range, but only to prune rotten and dry roots. From the appearance, the growth is good, the foundation is solid, the root is clean and full, but the condition is not good, only need a little pruning, can not prune too much, but is not conducive to the recovery of growth.
2. Moderate repair: if the growth of the plant is poor, the root development is weak, or there are diseases and insect pests, moderate pruning is required in this case. Can repair part of the main root and all the surrounding fibrous roots, which can induce the plant to grow roots.
3. Heavy repair: if the growth state of the plant becomes very bad and you want it to grow rapidly, you can prune it severely. Can cut off most of the main root and all the fibrous roots, cut off half or even more, which can promote its rapid growth, but easy to trigger the opposite effect.
Can't prune in growing season, summer type can be carried out in spring, winter type can be carried out in autumn
