When should a kentucky coffeetree be pruned?
Prune in late dormancy, and prune it young. The trap is that coffeetree has extremely coarse, sparse branching with no fine twigs to hide a mistake — a bad cut is visible for a decade because the tree does not backbud freely to fill the gap — and the narrow, upright cultivars sold for street use build codominant unions that need to be corrected at 3 to 5 inch caliper, not at 15.
Reading kentucky coffeetree before you cut
Coffeetree has very few serious pests or diseases, so when one declines the cause is almost always mechanical and recent — trenched roots from a utility or irrigation run, a grade change that buried the flare, or a girdling root from a poorly planted ball. Read it by timing: bare in May is normal, but leaves that emerge undersized and pale and then thin out from the top of the crown downward through one season means the root system was cut, not that the tree is sick.
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