Some farmers choose to raise the soil around fruit trees by 30 to 40 cm or even higher when planting. They believe this practice helps the trees grow better, but this is actually a common misconception. Raising the soil too high—often referred to as "Gao Peituu" in some regions—can be harmful. It restricts root respiration, which is essential for healthy tree development. This elevated soil also limits the activity of beneficial aerobic bacteria in the soil, preventing them from breaking down organic matter into nutrients that the roots can absorb. As a result, the tree’s ability to take in essential nutrients is reduced, which affects leaf production and overall growth.
Moreover, the raised soil creates an environment where new roots struggle to establish properly. Instead of spreading out naturally, roots tend to grow in a limited space, often forming what's called "double roots." This competition for water, nutrients, and space between upper and lower layers can weaken the tree's structure. When these new roots dry out in the fall, they may die due to insufficient moisture, leading to significant nutrient loss and long-term damage to the tree.
On the other hand, if there's not enough soil around the tree, it can also be problematic. Insufficient soil restricts root growth, which in turn hinders the development of trunks, branches, and leaves. During the rainy season, water can pool in the planting hole, causing root rot. In winter, snow and ice can freeze the roots, further damaging the tree.
The ideal height for the soil around fruit trees and landscape trees is about 10 cm above the ground. It should not be compacted again after planting, as this can lead to poor drainage and water accumulation. Allowing the soil to settle naturally ensures proper aeration and prevents waterlogging. By maintaining the right soil level, you support healthy root development, better nutrient uptake, and stronger, more resilient trees.
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