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Light-bark trees are most notorious for producing lots of sap when wounded. These varieties include maples, birches, poplars, dogwoods, magnolias, and elms, and they will bleed more when the trees are dormant. That’s why it’s a good idea to prune them in the summer months rather than waiting until winter.

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.

In some states and municipalities, you will need a permit to remove a tree on your property. In many cases where permits are required, a tree must reach a maximum height before a permit is required to remove it. You can either ask your local building department or a tree removal professional if you’ll need a permit. If you do, you can expect to pay between $50 and $150 for the permit alone. Your tree removal company should pull the permit for you and include the permit fee in your total.

Ideally, you should wait to prune until trees have gone dormant in late fall to early winter. The worst times to prune trees are early fall and late summer, as pruning them so close to dormancy makes it difficult for the tree recover before it goes dormant for the season.