Every year around Thanksgiving the phone gets quiet. The leaves are down, the yard is put away, and most people stop thinking about their trees until something blooms or something breaks. That's understandable. It's also backwards, because the stretch from leaf drop to bud break is when a lot of the most useful tree work gets done.
In Kent and the rest of Portage and Summit counties, that window runs roughly from mid-November to late March. Here's why it matters, what we do during it, and a few things you can do yourself.
What dormant actually means
A dormant tree isn't asleep in any simple sense. It has stopped growing new shoots and leaves, and it's living on what it stored over the summer: sugars and starches packed into the roots, trunk and branches. Roots keep working whenever the soil isn't frozen, and the tree is quietly preparing for spring.
That stored energy is the whole story. When the buds break in spring, the tree spends a large share of its reserves pushing out a new canopy all at once. Anything that affects those reserves, or how they're spent, matters more in winter than it looks.
If a branch needs to come off, it makes sense to remove it before the tree spends its stored energy growing leaves on it.
Why winter is the best time to prune most trees
For most shade trees in Northeast Ohio, late dormant season is the best time of year to prune. There are four reasons, and they stack on top of each other.
You can see the structure. With the leaves off, every crossing branch, weak union, dead limb and crack is in plain view. We make better decisions about what to cut, and what to leave, when we can see the whole tree.
The tree's energy goes where you want it. Cuts made in late winter mean the tree doesn't spend reserves leafing out wood that's about to be removed. When growth starts, it starts on the branches you're keeping, and the wounds begin closing right away.
Fewer insects and diseases are active. Many of the pests and pathogens that move into fresh wounds are dormant or absent in the cold. That's the main reason oaks get special treatment, below.
The ground is on your side. Frozen or firm ground carries equipment with far less rutting and compaction than soft spring soil, which protects your lawn and, more importantly, the roots under it.
The oak rule
Oak wilt is present in Ohio, and it's spread largely by small sap beetles that are drawn to fresh wounds on oaks. Once it gets into a red oak, it can kill the tree within a season, and it can move to neighboring oaks through connected roots.
Ohio State University Extension recommends pruning oaks only between mid-October and mid-April, and Ohio arborists note the beetles can become active as early as March. So our rule is simple: we schedule oak pruning in the heart of the dormant season, November through February, and we don't cut oaks from spring through summer unless a branch is a genuine hazard. If an oak has to be cut in the risk period, the wound gets sealed the same day.
If you have oaks and someone offers to prune them in May, ask why it can't wait.
What not to prune in winter
Dormant pruning is right for most trees, not all of them. A few common exceptions:
Spring-flowering trees and shrubs: lilac, forsythia, rhododendron, azalea, magnolia, redbud and flowering dogwood set this spring's flower buds last summer. Prune them in winter and you cut off the bloom. Prune them right after they flower instead.
Maples and birches in late winter: they 'bleed' sap heavily when cut as the sap starts moving in February and March. It doesn't hurt the tree, but it's messy. We either prune them earlier in the winter or wait until the leaves are fully out.
Deep cold snaps: frozen wood is more brittle and tears more easily. We plan larger cuts for milder winter days rather than the coldest week of January.
Anything that's only cosmetic on a stressed tree: a tree that's already declining needs its leaves. Heavy pruning takes away the canopy it uses to rebuild its reserves.
Dormant oil: the quiet winter treatment
Scale insects, mites and aphid eggs spend the winter tucked into bark crevices and around buds, waiting for spring. A horticultural oil applied while the tree is dormant coats them and smothers them before they hatch, with very little effect on beneficial insects that aren't there yet.
Timing is the whole trick. We apply dormant oil before the buds open, on a day that's above 40°F with no hard freeze expected for the next day, so it can dry properly. It's most useful on trees and shrubs that had scale or mite trouble last year, and it's skipped on a few plants that react badly to oil, such as blue spruce, where it can strip the blue color from the needles. Dormant oil or an anti-desiccant spray is part of the plant health care we do in winter, and it's included in our Crown membership.
Protect evergreens from winter burn
Evergreens keep losing water through their needles and leaves all winter. On a sunny, windy day with the ground frozen, they can't pull water back up from the roots, and the result is brown, scorched foliage by March. Arborvitae, boxwood, rhododendron and holly near driveways and on the south or west side of the house get it worst.
Three things help. Water evergreens deeply in late fall, right up until the ground freezes. Keep two to three inches of mulch over the root zone, pulled back a few inches from the trunk, never piled against it. And on exposed broadleaf evergreens, an anti-desiccant spray in late fall or early winter can cut the water loss.
Salt, snow and ice
Road and sidewalk salt is one of the most common causes of decline we see in trees along driveways and streets in Kent, Stow and Hudson. It damages roots through the soil and burns evergreen foliage through spray from the road.
Shovel and plow snow away from the root zones of trees and shrubs rather than piling it on them, use less salt or a non-sodium de-icer near plantings, and consider a burlap screen for evergreens right beside a busy road. After heavy wet snow, brush it off lower branches gently with an upward motion. Leave ice-coated branches alone. They're brittle, and shaking them breaks more than the ice does. If a storm leaves a large limb cracked or hanging, call us rather than pulling it down yourself. Our emergency line is answered around the clock.
Young trees need a little extra
Trees planted in the last few years have thin bark and shallow roots. Rabbits and voles chew bark at the base under the snow, and a single winter can girdle a young tree. A loose plastic or hardware-cloth guard around the lower trunk prevents it. Take it off in spring so it doesn't trap moisture or rub.
Winter is also a good time to check stakes and ties on newly planted trees. Most trees don't need staking after the first growing season, and wires left on too long cut into the trunk.
Check for spotted lanternfly egg masses
Ohio put a statewide spotted lanternfly quarantine in place in February 2026. Adults die off in the cold, but the eggs survive the winter in masses about an inch long that look like a smear of dried gray mud. They're laid on tree bark, especially tree-of-heaven, but also on stone, fences, firewood, grills, trailers and vehicles.
If you find one, scrape it into a bag or a container of rubbing alcohol and seal it. Each mass you destroy in winter is 30 to 50 fewer insects in spring. Be careful moving firewood, outdoor furniture or equipment out of the area, since that's how the insect travels.
A winter checklist for your property
None of this takes long. One walk around the yard on a clear day in December or January covers it.
Look up at each large tree with the leaves off. Note dead branches, cracks, hangers left from storms, and any branch rubbing on the roof.
Check the base of each tree for mushrooms, soft or missing bark, and soil heaving or cracking on one side.
Make a list of trees you'd like pruned, and get the oaks on the calendar before March.
Water evergreens during dry spells before the ground freezes, and keep mulch off the trunks.
Keep salt and plowed snow piles away from planting beds and root zones.
Put guards on young trees and loosen or remove old stakes and ties.
Scrape any spotted lanternfly egg masses you find.
When it's worth having an arborist look
If your walk turns up a crack in the trunk, a large dead limb over the house or driveway, a tree that's started to lean, or mushrooms at the base, that's worth a professional look before the spring storms. Winter is a good time for it: we can see the whole structure, the calendar has room, and any pruning we recommend can be done in the right window.
Estimates are free, in person and in writing. Request one online or call (330) 221-1617. If you'd rather have someone walking your property on a schedule every year, that's what our tree health membership is for.
