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Dead tree branches should be removed, because they can cause the tree to lose nutrients. They can also make the tree more susceptible to disease and pests. Removing dead and diseased branches can help the tree recover and increase the odds of saving a dying tree. Make sure to prune the tree correctly to avoid damaging it further.

Hiring an arborist is usually more expensive than hiring a standard tree company, but it’s typically well worth the investment. If you suspect a tree is infested or diseased, hiring an arborist can help avoid the same fate for nearby trees, and prevent removal. Arborists might also be necessary if you’re dealing with tree removal or trimming near power lines, as uncertified removal companies often aren’t permitted to service these trees. Finally, if your aim is to preserve the health of your trees, an arborist is absolutely worth the money.

No, you don’t need a pruning seal for trees post-trim. Pruning seals (applied to the cut ends of branches) are widely sold but they aren’t designed for every tree and in many cases can cause more harm. Trees have their own healing processes after pruning, so the best thing you can do is supply them with plenty of water and add some dormant-style fertilizer.

Pruning seals are primarily recommended for very vulnerable species like elm trees in areas where dangerous tree diseases like Dutch elm disease are spreading. In these cases, a sealant’s protection outweighs its downsides.

You can find pruning paints and sealants for trees, but you shouldn’t use them on a topped tree. Coatings like these often inhibit the tree’s healing process. An important exception is if there are dangerous fungi nearby that the tree is particularly vulnerable to, like oaks and oak wilt. Sealing cuts can help prevent fungi from taking root.