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Early signs that a tree is struggling include premature leaf shedding and lesions or other strange markings. Peeling bark, dead or rotten branches on the ground, and a conspicuous lack of leaves can all be signs that a tree has started to die. By the time a tree starts leaning, it’s usually too far gone to save.

It could be anywhere from weeks to years for a dead tree to fall. A dead tree falls based on its weight, how it leans, the state of its roots, the state of decay, and what local windstorms are like, among other factors. Since it’s hard to predict the fall’s timing, it’s important to cut down a dead tree quickly and avoid any unpleasant surprises.

The ideal time to prune a tree depends on the type of tree. Typically, late winter or early spring is a good time to prune but isn't always the case for "towering trees." It's best to trim when trees are dormant and before blooms appear but can vary depending on the tree type. It's always best to research the type of tree or ask a professional tree trimmer to determine when is the perfect time to prune your tree.

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.