A forecast of frost or heavy snow does not mean every plant needs to be wrapped. The right response depends on what is growing, how cold it will get, how long the cold will last, and whether the plant is in the ground or a container. A few timely steps—watering dry soil, insulating vulnerable roots, and covering tender plants correctly—can reduce winter damage without trapping moisture or stressing branches. Here’s how to decide what to protect, prepare your garden before a storm, and handle snow and cold once they arrive.

Decide what needs protection before the forecast turns cold

Start with each plant’s cold tolerance, not the forecast alone. A plant’s hardiness rating offers a guide to the winter temperatures it may survive, but it does not guarantee it will tolerate a sudden cold snap, strong wind, wet soil, or a sheltered garden’s first exposure to freezing weather. Plants that were recently planted, are still growing actively, or are already stressed may need more help than established plants suited to your climate.

Your garden’s microclimates matter too. A south-facing wall may stay warmer than an open, windy bed; a low spot can collect cold air; and a plant under an evergreen may experience different conditions from one exposed to the sky. Check the forecast for your garden’s overnight low and expected duration of freezing, then prioritize plants that are both vulnerable and exposed.

A useful order of attention is:

• Protect first: Tender annuals, tropical plants, newly planted specimens, and plants in pots that cannot tolerate your local winter.
• Inspect next: Broadleaf evergreens and borderline-hardy plants in windy or exposed locations.
• Leave alone unless conditions are unusual: Established, cold-hardy plants that are healthy and suited to the site.

This prevents a common mistake: covering everything, including plants that need no protection, while overlooking a vulnerable pot near a cold wall. If you are unsure about a plant’s hardiness, check its nursery label or a reliable local gardening resource.

Prepare soil and roots before the ground freezes

Roots are harder to protect once soil is frozen, so prepare beds while the ground is workable. If the soil is dry and a freeze is approaching, water the root area thoroughly rather than sprinkling leaves. Moist soil holds more heat than dry soil, but waterlogged soil can harm roots and may freeze into a dense, cold mass. Skip extra watering if the ground is already wet or rain is expected.

After the soil has cooled, spread mulch over the root zone of vulnerable perennials, shrubs, and young trees. A few inches of suitable organic material—such as shredded leaves, straw, or bark—can moderate temperature swings and help limit repeated freezing and thawing. Keep mulch away from trunks and woody stems; piling it against bark can keep it damp and encourage damage.

Wait until plants are dormant or the ground has cooled before applying a thick winter layer. Mulching too early over warm soil can delay dormancy, while a deep, dense layer against crowns may trap moisture. For a recently planted shrub, spread mulch over the root area rather than building a mound around its stem. In spring, check whether the material has shifted and pull it back if it is covering new shoots.

Cover tender plants without trapping cold or moisture

For a frost warning, use a breathable frost cloth, old sheet, or similar lightweight fabric. Drape it over the plant and extend it to the ground so it can hold warmth rising from the soil. Secure the edges with stones or clips, but avoid crushing the plant. A cover that stops above the soil may protect the leaves while allowing cold air to move underneath.

Do not let plastic sheeting rest directly on foliage. Plastic can transfer cold to leaves where it touches them, and on a sunny day it can heat the covered area. If plastic is your only option for a short overnight event, use it as an outer layer supported by stakes or a frame, with fabric between the plastic and the plant. Remove the plastic promptly after the temperature rises; breathable cloth can usually remain in place longer, but uncover plants when conditions are mild enough to prevent overheating and excess dampness.

For a single cold night, a simple cover may be sufficient. For a prolonged cold spell, check that the cover remains dry and secure, and make sure it does not press heavily on branches. Covering is a short-term buffer, not a substitute for choosing plants suited to the site. If a tender plant faces repeated freezes, moving it to a sheltered location may be more reliable than repeatedly covering it.

Protect containers, which cool faster than garden beds

Roots in pots have less surrounding soil to insulate them, so a container plant may be at greater risk than the same plant in the ground. Before a freeze, move tender pots to an unheated garage, shed, porch, or other sheltered place if the plant’s needs allow. Avoid bringing a dormant plant into a warm living room for an extended period; warmth can disrupt dormancy and encourage growth that is vulnerable when it goes back outside.

If a pot must stay outdoors, group containers together in a protected spot and place them where wind exposure is lower. Insulating the sides of the pot with burlap or another suitable wrap can slow temperature swings, but keep drainage holes clear. Do not let a container sit in a saucer full of water, where it can freeze around the roots.

Check moisture occasionally through winter. Containers can dry out even when the weather is cold, especially under eaves or during windy spells, but watering frozen soil will not help. Water only when the potting mix is not frozen and the plant’s condition and weather allow the excess to drain. For valuable or especially tender plants, moving the pot into shelter is usually simpler than trying to protect it outdoors.

Let light snow insulate, but reduce dangerous weight

A light layer of snow can insulate soil and plant crowns, so there is usually no need to clear it from garden beds. The greater concern is heavy, wet snow that bends or loads branches, especially on multi-stem shrubs, arborvitae, and other evergreens. If snow is accumulating and branches are still flexible, gently lift or brush it away with a soft broom, working upward from the bottom of the plant.

Do not yank branches, strike them, or shake them when they are frozen. Cold branches can snap under rough handling. If a limb is already bent beneath a heavy load, remove snow carefully in small amounts; if it remains trapped or appears cracked, wait until conditions are safe and assess the damage after the storm.

Avoid piling shoveled snow on shrubs or garden beds where it may compact them. Snow from roads and paths may also contain deicing salt, which can injure plants and soil. Keep that snow away from planting areas, and avoid applying salt where runoff can drain into beds. For a damaged woody plant, wait until the immediate cold has passed before deciding what to prune; a branch that looks lifeless in winter may still have living tissue.

Reduce winter drying, wind exposure, and salt injury

Winter damage is not caused by frost alone. Evergreen leaves and needles can lose moisture on sunny or windy days while frozen ground prevents roots from replacing it. Newly planted evergreens and broadleaf shrubs are especially vulnerable because their roots may not yet be established. A thorough watering before the ground freezes can help when autumn has been dry, but it should not leave soil saturated.

If wind is the main problem, a screen or temporary barrier on the exposed side can reduce drying without wrapping the whole plant tightly. Burlap supported on stakes can serve as a windbreak; avoid pressing it against foliage or sealing the plant inside. This is different from a frost cover, which should generally reach the ground to hold warmth for a short cold event.

Salt spray and salty runoff can cause browning along the side of a plant facing a road or walkway. Use sand or another traction material where appropriate, and direct salty snowmelt away from garden beds. Do not assume that brown foliage means the entire shrub is dead. Wait until spring growth provides clearer evidence before removing a plant or cutting back healthy-looking wood.

Choose prevention over rushed winter pruning

Prepare plants before severe weather, but resist the urge to prune everything in fall. Cutting back some plants at the wrong time can expose tender growth or remove stems that help protect crowns. Leave sound woody branches in place through winter unless they pose an immediate hazard or are clearly broken. You can assess winter injury more accurately when growth resumes.

Before the season’s first major storm, secure loose stakes and supports, store hoses, and protect irrigation equipment according to its instructions. Remove dead or unstable branches that could fall, but use a qualified professional for large limbs near buildings or power lines. These tasks reduce the chance that snow or ice will turn a minor weakness into a safety problem.

After a storm, inspect plants when it is safe to do so. Note broken branches, lifted root balls, shifted mulch, and places where runoff has collected. Make only necessary emergency cuts at first, then revisit pruning decisions in spring. Keeping a short record of which plants needed protection—and which survived without it—will help you adjust next winter rather than repeating unnecessary work.

Frequently Asked Questions

Should you shake snow off a tree?

No. Shaking can break branches, particularly when wood is frozen or already bent under a heavy load. If it is safe, gently brush wet snow from reachable branches with a soft broom, moving upward from the lower branches. Leave high branches and any limb near electrical wires to a qualified professional.

Can you use fallen leaves as winter mulch?

Yes, if they are healthy and not packed into a dense, soggy layer. Shredded leaves are less likely to mat than whole leaves and can insulate perennial beds. Keep the material away from woody stems, and avoid using leaves from plants showing signs of disease.

Should you fertilize plants before winter?

Avoid a late-season application intended to force new growth. New shoots may be more susceptible to cold, and fertilizer is not a substitute for appropriate watering, mulch, or protection. Follow the plant’s normal feeding schedule and local guidance rather than fertilizing in response to an approaching frost.

Is snow always good for a garden?

No. Light snow can insulate soil, but wet, heavy snow can bend or break plants. Snow mixed with deicing salt can also damage beds, and compacted piles may smother small plants. Leave clean, light snow in place where practical, but keep salty plowed snow away from planting areas.

Make a short protection plan before the next freeze

Walk the garden before the next cold spell and identify the plants most exposed to frost, wind, or snow load. Water dry soil if a freeze is approaching and the ground is still unfrozen, add mulch over vulnerable root zones, and move tender containers into shelter. Keep breathable covers and a soft broom somewhere accessible rather than searching for supplies during the storm.

After the weather passes, remove or adjust covers when conditions allow, check pots and beds for drainage, and note any damage without rushing to prune. Those observations will show you which plants need a different location, a sturdier support, or a more reliable winter shelter next season.