If possible, try to engage a tree surgeon with Trading.
The elm bark beetle, attracted to fresh tree wounds, is most active during the growing period between April and August. Cedar elms should not be pruned during this period.
Pruning Drooping Branches.
When is the best time for elm tree pruning? It is crucial to prune an elm tree at very specific times of year. Open wounds attract the elm bark beetle, so be sure to avoid pruning between April and July. Pruning during autumn is also a no-no.
Do not try to remove an infected elm tree by yourself, even if you have experience with cutting down other trees.
This is because autumn is fungi season, and fungi are the elm tree’s worst enemy. The best time therefore for elm tree pruning is early spring ahead of the growing season. Estimated Reading Time: 6 mins. Andres Mendoza of Ran Pro Farms shows how to correclty prune a cedar elm tree (in Spanish). It's best to prune elms in late winter, before new spring growth. References Lady Bird Johnson Wildflower Center: Pruning Mature Cedar Elm Trees in San Antonio.
Apr 02, Another time to start cutting back cedar trees is when you see damaged or dead branches. Prune out dead wood with sterilized clippers. If the cut should fall in the dead zone at the center of the cedar, cut it at the trunk instead.