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Bradford pear trees bloom in early spring with small white flowers. They typically flower for at least two weeks. In bloom, these trees often emit a foul-smelling odor that’s often compared to rotting fish. Bradford pear trees will sometimes bloom in the fall due to drought or other stress-inducing conditions. 

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.

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.

Dutch elm disease can’t harm humans. In fact, according to Cal Fire, bark beetles aren’t even typically dangerous to trees unless that tree is already weakened. The problem comes when Dutch elm disease kills a tree. That tree is more at risk of falling and catching fire, which can pose a serious threat.