Q.Limbs falling off
Even green healthy limbs are falling off. What am I doing wrong?
Certified GKH Gardening Expert
Without knowing what kind of tree, how big, where, what are the growing conditions and maintenance practices, I could only guess. Here are some possibilities. In evergreens, the problem is usually ongoing for up to a year before symptoms show. You may want to call your local extension agent for help and to assist with a soil sample.
https://www.gardeningknowhow.com/ornamental/trees/pine/pine-tree-drying-bottom.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/dry-brittle-tree-branches.htm
https://www.gardeningknowhow.com/ornamental/trees/pine/pine-tree-browning.htm