Winters here are mild but not harmless. Sudden hard freezes, winter storms, drought-dried soil, oak wilt timing and weak overextended limbs all come into play. Winter is also one of the best times to inspect and prune, because growth has slowed and structure is visible.
Related: Tree trimming in Wimberley and the Hill Country.
1. Inspect for structural problems
Walk the property and look for dead or dying limbs, cracks in major branches, limbs hanging over roofs, driveways or power lines, and trees leaning or showing exposed roots. If a limb looks questionable now, winter weather will not improve it.
2. Prune, with timing in mind
Remove dead, damaged and crossing branches, reduce weight on long overextended limbs, and improve airflow through dense canopies.
The oak exception. Oak pruning should generally be avoided during oak wilt season unless necessary, and where it is necessary, cuts get sealed immediately. See oak tree trimming.
3. Water before a freeze
This surprises people: dry soil makes trees more vulnerable to freeze damage. Before a hard freeze, water deeply, especially younger trees, focusing on the drip line rather than the trunk, and without saturating already wet ground. Moist soil holds heat better than dry soil and protects roots.
4. Mulch
Two to four inches around the base, kept a few inches clear of the trunk. Insulates roots against temperature swings, holds moisture and reduces weed competition.
5. Skip late fertilising
Feeding late in the season pushes soft new growth that cold then damages. Leave nutrient support until early spring once trees come out of dormancy, if a soil test says it is needed at all.
Why winter is the best time to look
On deciduous trees a thinner canopy can make structure easier to see from the ground. Small cracks, weak branch unions, early decay and root problems all show up, and every one of those is what actually fails under ice or in a spring storm.
Local terrain here is rocky limestone and steep slopes, so root plates are wide and shallow. Check the base as carefully as the canopy: soil heaving on one side, exposed roots, or a lean that was not there last year.
Pruning to the right rules
Prune no more than 25% of the canopy in a year, and less on a tree already carrying drought stress. Avoid removing branches larger than four to six inches in diameter where you have the choice. Make clean cuts just outside the branch collar so the wound can seal, and sanitize tools between trees.
Reduce weight on long overextended limbs rather than simply lifting the canopy, and improve airflow through dense crowns so wind passes through rather than pushing against them.
Oaks specifically
Winter is a good time for oak work, with the structure easy to read. Paint every oak cut immediately with latex paint or a wound dressing, whatever the month, and treat accidental bark damage the same way.
Water before a freeze
Dry soil makes trees more vulnerable to freeze damage, because moist soil holds heat better and protects the root zone. Water deeply at the drip line before a hard freeze, especially on younger trees, without saturating ground that is already wet.
Mulch, and skip the late feed
Two to four inches over the root zone, kept three to six inches clear of the trunk. Never piled against the bark.
Do not fertilise late in the season. It pushes soft new growth that cold then damages. Leave any nutrient support until early spring, and only if a soil test says it is needed.
Not sure where your trees stand?
A few preventative steps now save a great deal later. Free evaluation, and we will tell you if nothing needs doing.