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Sudden oak death and oak wilt are different diseases. Oak wilt first shows up in tree leaves while sudden oak death affects the branches and trunk. However, as symptoms in both can overlap, it’s best to consult a professional arborist tree expert for a proper diagnosis and development of a treatment plan.

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.

Yes, tree roots can regenerate after they’re pruned or cut. In fact, trimming can stimulate new growth, especially in healthy trees. The tree’s roots can still grow back even after a tree is cut down, (and learning how to get rid of regrowing tree roots is a separate feat). Still, if you don’t wish to harm a tree, pruning the roots should be done with extreme care, and ideally by a professional.

Most trees can be successfully transplanted while they are young, but pines, walnuts, and some oak tree varieties are more difficult to move because their root systems grow deeper than most other trees. Also, trees adapted to sandy soil with wide root systems like beeches, willows, and aspens are harder to dig out because their roots spread much farther out from the trunk. In these cases, unless the trees are very young and small, it’s a good idea to consult a tree planting professional.