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UC IPM Home > Homes,
Gardens, Landscapes, and Turf > Fruits
and Nuts > Cultural Tips
How to Manage Pests
Pests in Gardens and Landscapes
Pruning walnut trees
Pruning is best done during the dormant season to invigorate the tree. This is the best time to prune
out diseased wood, crossing limbs, or narrow crotch angles. Pruning during the summer can control vigorous
shoot growth.
To prune mature trees, cut out dead wood, thin out crowded or crossing branches, and remove limbs that
are lower than desired. Moderately thin out the small fruiting wood throughout the tree by making small
cuts in limbs about 1 inch in diameter.
The natural appearance of the walnut tree is best maintained by making only thinning cuts--cuts close
to and parallel with the parent limbs or next to a lateral limb. Do not leave any branch stubs. Do
not cut branches that are larger than 4 inches in diameter because large wounds are slow to close
and may
be an entrance point for fungi. | 
Make only thinning cuts to maintain
natural appearance of walnut tree
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