It can be bad to leave a dead stump in the ground. A stump becomes a hefty piece of dead wood in time and eventually (especially with the help of rain) starts to rot. That makes it a locus point for diseases and pesky insects, as well as a bit of an eyesore. It’s best to remove a tree stump completely before it starts to decay, especially before it starts to fall apart. If the tree was removed because of disease, it’s even more important to fully remove the stump if possible.

The cost of professional tree trimming averages $460, with a typical range between $200 and $760. However, prices can be as low as $75 or as high as $1,800 depending on several factors. The size and type of the tree are major cost drivers; for example, trimming Crepe Myrtle trees costs an average of $80 to $400, while trimming giant pine trees can range from $200 to $1,800. Other factors that influence the price include the time of year, as services are often more costly in the spring. The tree's accessibility and your location also play a role, as a remote or hard-to-reach tree may increase the cost. Some professionals may offer a discount if you have multiple trees to trim.

Late winter is ideal, but if you’re pruning apple trees in the spring, prune them as early as possible in the season. You want to ensure your tree is just creeping out of dormancy and hasn’t started pushing out new growth. If you prune your tree too late into spring, you generally won’t see results until the following year.

That said, there’s no pruning season for unhealthy growth. Remove dead, dying, or diseased branches as soon as you notice them, regardless of the time of year.

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.