Your neighbor is not in a good position to know if your trees are truly dead or pose any kind of danger. That’s why hiring an arborist or tree service expert can be such an important part of the process. If the trees are still alive and don’t pose any threat, you’re in the clear (but you may want to document and photograph everything in case events turn sour down the road).

But if a tree is visibly dead and near the property line, you should remove it to be safe. If a dead tree falls on a neighbor’s property, they may have grounds to sue for negligence. If any branches on trees have died, it’s a good idea to cut them back for similar reasons.

Generally, you should prune around 20% of an apple tree’s growth—and never more than 30%. This means that if you have a severely overgrown tree, it can take a few seasons to prune it back enough to produce the healthiest fruit. 

If you’re dealing with a newly planted or juvenile tree, hold off on pruning beyond the initial shaping. Wait at least a couple of seasons into fruit production since pruning can increase the number of water sprouts and unproductive foliage.

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.

The ideal depth of a tree notch depends on the tree, but it should usually be between 20% and 25% of the tree’s depth. However, if the tree is leaning towards the direction of the notch, it can be cut more shallowly—at as little as 10% of the depth. When the tree is leaning away from the direction it needs to be felled, you can cut deeper, closer to 30%.