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Trees naturally want to grow upward, so one may straighten all by itself, though this only comes into play when a tree is leaning just a small amount. For trees growing into an awkward position or those leaning heavily in one direction, the above steps are necessary to ensure the tree gets back on the right path. This also holds true for trees planted in a spot with unstable soil.

You can use herbicides to prevent roots from growing without killing the tree itself, however they must be used with caution. Systemic herbicides are absorbed by the root and can kill off problematic roots. However, herbicides can sometimes negatively impact nearby plants, so the solution is best used sparingly.

In most cases, you should not use a pruning seal on trees after trimming. Applying a sealant can interfere with the tree's natural healing process, and it does not guarantee protection from pathogens. Instead of sealing the cut, the best practice is to support the tree's natural recovery by providing it with plenty of water and a dormant-style fertilizer. However, there are exceptions. Pruning seals may be recommended for very vulnerable species, like elm trees, in areas where dangerous diseases such as Dutch elm disease are prevalent. In these specific situations, the protection offered by a sealant can outweigh its downsides. For advice tailored to your situation, especially after cutting large branches, it is best to consult a local tree trimming professional.

On grafted trees, tree suckers will grow from the root stock, not the branches grafted onto it. Therefore, the leaves and characteristics of the suckers aren’t the same as the tree because they are different varieties. Root stock has more hardiness, strength, or drought tolerance than its grafted limbs, so if the suckers are from fruit or flowers, it might be different than the main part of your tree.