How to Care for Your Landscape After an Unseasonably Warm Winter

Spring is meant to be a slow awakening for trees, shrubs, and lawns, but when winter months are warmer on average, plants can get off schedule and fall victim to the confusing early start.

Plants entering the growing season with low reserves have the longest road ahead to summer. This guide walks you through what to check on a walk around your property, what those signs likely mean, and when it makes sense to bring in a certified arborist.

Why a warm winter leaves your landscape at a disadvantage

Plants generally leave winter with the smallest reserves of the year. Stored carbohydrates get pulled down through dormancy to keep tissues alive, and the first burst of new growth, like swelling buds, extending roots, unfurling leaves, draws against those reserves before photosynthesis can refill the tank.

A warm, dry, or erratic winter thins reserves further, which means a mild stretch from December through March can leave your plants with less fuel in reserve than a cold, steady winter would.

Catching stress early pays off later. Secondary insects and diseases typically take hold in plants already weakened by drought, root damage, or injury, which arborists and plant pathologists have documented for decades. Treating the environmental stress before borers, scales, or opportunistic fungi move in is where homeowners have the most leverage after a warm winter.

What to look for on a walk around your property

Work from the outside in. Stand back from each tree or shrub to take in the overall shape and canopy fullness, then move closer to inspect bark, branches, and the base. The same sequence applies to lawns — scan the full expanse first, then look at individual patches.

Canopy and leaves

Leaves are where plants show stress. Compare trees of the same species to each other as you walk and compare this year's growth to what you remember from last year. Photos taken from the same vantage point across seasons make comparisons easier.

Signs worth noting include:

Delayed or absent leaf-out: If most of a tree is leafed out and one or more branches have stayed bare well into the season, those branches may be dead or severely stressed.
Uneven leaf size or color: Smaller leaves, paler green, or yellowing between the veins (chlorosis) often indicate root-zone problems or nutrient issues.
Scorched margins: Brown, crispy edges on otherwise green leaves usually indicate leaf scorch from drought stress, salt damage, or root water uptake problems.
Curling or cupping: Leaves that curl inward can reflect drought, aphid feeding, or herbicide drift.
Early drop: Green or slightly yellow leaves falling in late spring or early summer are a stress response, not a normal seasonal shed.
Thin canopy or dieback at the top: Light showing through where the crown used to be full, especially on the upper branches, is a classic sign of ongoing stress.

If you notice any of these symptoms in the trees on your property, call an ISA Certified Arborist® who will assess further and create a plan of action to care for trees that have been affected by a mild winter.

Bark and trunk

Circle the trunk and look for changes. Healthy bark has a consistent texture for the species, no weeping wounds, and no fine powdery material at the base. Watch for:

Vertical cracks or splits: Cracks can follow rapid temperature swings, sunscald on the south or west side, or drought-related tissue shrinkage, all of which are more common when winter temperatures swing around.
Sunken, discolored patches (cankers): These indicate fungal or bacterial infection, often at a site where the tree was previously injured.
Peeling or flaking bark: Look for signs outside species-normal shedding that may indicate disease or pest activity beneath the bark.
Fine sawdust or frass: Found at the base of the trunk or in bark crevices, which is a strong signal of boring insects. Check for small, round, or D-shaped exit holes nearby.
Mushrooms or shelf fungi: Fungi attached to the trunk or root flare, which suggest internal decay.

Soil and mulch at the base

Look down while you're circling the trunk. A few things to check:

Mulch depth: should sit 3 to 4 inches deep and extend out toward the dripline, not pile against the bark.
Thin or washed-out mulch: bare or sparsely covered soil loses moisture fast to evaporation.
Cracked or pulling-away soil: a sign that moisture loss is already underway and roots are feeling it.
Finger test: push a couple of inches into the soil under the canopy. If it's dry well before summer heat, the plant is working with less than it should this early in the season.

Branches and twigs

A warm winter pushes buds and shoots out ahead of schedule, and a single hard freeze afterward can wipe out the most productive growth a tree has lined up for the season.

Watch for:

Swollen buds that stalled: plumped up during warm weeks, then stopped. A light freeze can damage the growing point without changing the bud's appearance.
Tip dieback on new shoots: the last inch or two going brown after a cold night, usually frost injury rather than drought.
Bud failure across multiple branches: buds that formed last year and never opened, a stress indicator tied to low winter reserves.
Brittle, pencil-thick twigs snapping clean, pointing to dieback already in progress.

Lawns

Grass responds faster than any other plant in your landscape, so lawn symptoms show up quickly after a warm winter. Look for:

Slow or uneven green-up: this can indicate soil compaction, thatch buildup, or winter desiccation.
Thin, pale patches: These often stem from root problems such as grubs, compaction, or dry pockets.
Brown rings or arcs: can signal fungal disease that sets up in lawns stressed by drought or heat the previous year.
Heavy weed pressure: relative to the rest of the yard usually means the turf is too thin or too short to outcompete the weeds.

A five-minute property check

For homeowners with multiple trees, shrubs, and a lawn to monitor, create a short repeatable routine to assess your landscape.

Walk your property line and scan each tree from a distance. Note any with thinner canopies, uneven leaf-out, or dead tips.
Approach each flagged tree and circle the trunk, looking at bark condition, root flare, and the soil at the base.
Do a twig-snap test on any branch that looks suspect.
Walk the lawn in a Z pattern across the yard, watching for color differences, bare patches, and weed concentrations.
Record what you saw with dates. Quick phone notes give you a record to compare against in two weeks or a month.

When to bring in an ISA Certified Arborist®

A certified arborist can diagnose what a visual inspection cannot, including internal decay, soil nutrients and compaction issues, and root-zone problems. Consider a professional assessment if you see any of the following:

Multiple stress symptoms on the same tree.
Decline that worsens between walks.
Insects or disease signs you cannot identify.
Structural concerns such as cracks, leans, large dead limbs over a walkway or roof.
You’re uncertain and want a professional opinion.

SavATree's ISA Certified Arborists® can assess plant health on-site and develop a care plan tailored to your soil, species, and local conditions. Reach out for a complimentary consultation to assess how winter has affected your property and to create a plan of action as spring takes root.