If you own a live oak, red oak, or any oak in Texas, when you trim matters more than how you trim. Oak wilt — a fungal disease spread by sap-feeding beetles — kills tens of thousands of Texas oaks every year, and most infections start at fresh pruning cuts made in the wrong season.
The safe trimming window
Texas A&M Forest Service recommends pruning oaks only during the coldest part of winter (roughly mid-July through January) or the peak heat of summer, when beetle activity is lowest. February through June is the high-risk window — avoid all non-emergency cuts during that time.
If you must cut during the danger window
- Paint every fresh cut within minutes — wound paint or pruning sealer is fine.
- Sterilize tools between trees with a 10% bleach solution.
- Limit cuts to absolutely necessary work (storm damage, hazards, clearance).
Signs your oak may already be in trouble
Yellow or browning veins on leaves, sudden defoliation, and a 'wilted from the top down' look are all classic oak wilt symptoms. Call a certified arborist immediately — early diagnosis is the difference between losing one tree and losing your whole canopy.
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Pro-Connect matches you with ISA-certified arborists in the Houston metro who know oak wilt protocol cold. Request a free quote and we'll connect you within hours.