Shrubs
Pruning Windows for Common Shrubs
When to prune what in North Texas — bloom timing, freeze recovery, and the oak wilt window your whole crew should know.
Pruning at the wrong time rarely kills a shrub, but it erases the feature the client is paying for — a spring without blooms, a hedge scorched by an August shearing, or a crape myrtle butchered into knuckles. Timing is free. Build these windows into your maintenance calendar and route sheets.
The one rule that covers most cases
Prune spring bloomers right after they flower; prune summer bloomers and non-bloomers in late winter. Spring bloomers (quince, spirea, azalea, Indian hawthorn, forsythia) set flower buds the previous summer — a February shearing cuts the show off. Summer bloomers (crape myrtle, vitex, abelia, roses) flower on new wood, so a February cut feeds the bloom.
| Plant | Window | Notes |
|---|---|---|
| Crape myrtle | Mid to late February | Thin interior stems and remove crossers only — do not top. Topping ruins structure and does not increase bloom. |
| Hollies (yaupon, Nellie R. Stevens, dwarf types) | Late winter, before flush | Tolerate hard renewal cuts; shear lightly again after spring flush if formal. |
| Boxwood | Late winter + light touch-ups through June | No shearing after early September — tender regrowth burns in the first freeze. |
| Spirea, quince, Indian hawthorn | Within 4 to 6 weeks after bloom | Spring bloomers; late cuts remove next year's flowers. |
| Salvia greggii | Late February, again lightly in August | Cut back by one-third to one-half; the August trim resets fall bloom. |
| Ornamental grasses (muhly, miscanthus) | Late February | Cut to 4 to 6 inches before new growth; one pass with hedge trimmers and a bungee. |
| Texas sage | Late winter, selective only | Hates repeated shearing — it hollows out. Head back long shoots by hand. |
| Roses (shrub types) | Mid-February | Around Valentine's Day is the regional habit for a reason. |
Freeze damage: wait, then cut
After a hard freeze event, the pressure to clean up brown material is immediate — resist it until you can see where regrowth starts. Wait until mid-April, scratch-test bark for green cambium, then cut dead wood back to live tissue. Pittosporum, loquat, wax myrtle, and gardenias often resprout from the base after single-digit events; cutting in February means guessing, and guessing means cutting live wood or leaving dead stubs. Sell the client a two-visit recovery: a light safety cleanup now, structural cuts after green-up.
Oak wilt window — non-negotiable
Do not prune live oaks or red oaks between February 1 and July 1, when the beetles that spread oak wilt are most active. Paint every oak cut, any month, immediately. This applies to the incidental cuts crews make around structures, not just formal tree work — put it in your crew orientation.
Shearing versus selective cuts
- Shearing is a surface treatment — it thickens the outer shell and hollows the interior. Reserve it for formal hedges and dwarf hollies that tolerate it.
- Once or twice a year, follow shearing with a few interior thinning cuts so light reaches inside the canopy and the hedge does not die from the inside out.
- Never shear off more than one-third of a shrub's foliage in one visit, and avoid any hard cutting in the 100-degree stretch of July and August — regrowth burns and plants stall.
- Keep bypass loppers on the trailer alongside the hedge trimmers. Half of good pruning is having the right tool within reach.
A maintenance contract that names these windows — crapes in February, spring bloomers after flowering, no oak cuts in spring — reads as expertise to the client and protects you when a neighboring crew tops a crape and the client asks why yours look different. Different is the point.
Have a question about material for this job? Call the yard at (817) 431-9490 or browse live inventory.