How to Protect Roses in Winter

Updated September 2026 · Garden Advice Guide

The whole of how to protect roses in winter is one job: keep the graft union and the base of the canes at a steady cold temperature instead of letting them swing between thaw and freeze. That means stopping nitrogen about six to eight weeks before your first hard freeze, letting the last flowers turn into hips so the canes harden, watering deeply until the ground freezes, and then, only after several nights at 28°F or below, mounding 10 to 12 inches of loose soil or compost over the crown. Everything else is a variation on that, and half the roses in America need none of it.

Time it off your own weather: look up your first hard freeze window with our free frost date lookup, then count the six to eight weeks backward for that last feeding. The date on a bag of fertilizer is not your date.

Updated September 2026

Which roses actually need protecting

Before you buy a single burlap wrap, sort your roses into three piles. Most gardens have plants in all three, and treating them the same way wastes a weekend and can do real damage.

That "reliably hardy to" column is about cane survival, not root survival. A hybrid tea in zone 5 usually keeps its roots and loses every cane above the snow line. That is the difference between a rose that starts the season at 30 inches and one that starts at two inches, which decides whether you get flowers in June or in August.

The lower two rows are the exceptions that catch people. Tree roses carry a second graft three or four feet up in the air, where there is no soil warmth and no snow cover, so a tree rose in zone 6 is far more vulnerable than the identical variety grown as a bush. Container roses freeze at the root, and a pot on a patio runs several degrees colder than the same soil in the ground, which is why the rule of thumb is to treat a potted rose as two zones tender.

The fall timeline: stop feeding, stop deadheading

The most useful winter protection happens in August and September, before anyone thinks about covers. You are trying to get the canes to shift out of soft growth and into hardened, woody tissue with sugars packed into the cells. Soft growth in October freezes and dies back and can carry the dieback down past the graft.

Six to eight weeks before your first hard freeze: last nitrogen. In zone 5 that is usually mid August. In zone 7 it is early September. Nitrogen pushes a flush of soft new shoots that take about six weeks to harden, so anything you feed after that window is a liability. Potassium is different, and a low nitrogen, higher potassium feed in late summer is fine because potassium is directly involved in cold hardiness.

Four to six weeks before your first frost: stop deadheading. This is the step most people skip, and it does more than the mulch. Cutting spent flowers tells the plant to make more flowers. Leaving them tells it the season is over, and it sets hips and starts moving resources down into the wood. Let the last flush go to hips. The orange and red hips are also the best part of a winter rose bed to look at.

Keep watering until the ground freezes. A dormant rose still loses water through its canes all winter, and it cannot replace it once the soil is frozen. A plant that goes into winter dry is the one that comes out in March with shriveled brown canes. Water deeply once a week through fall whenever you have not had an inch of rain, right up until the ground firms up.

Do not prune in fall. Full pruning in autumn opens fresh wounds that will not heal and stimulates growth at exactly the wrong moment. The single exception is wind pruning: if you have canes over four feet tall in an exposed spot, shorten them to about three or four feet so winter wind cannot rock the plant and open a funnel around the crown. That is a stability cut, not a pruning cut, and the real pruning happens in spring.

Clean up the leaves. Black spot and rust overwinter on fallen leaves and on leaves still clinging to the canes. Strip and rake, and put rose leaves in the trash rather than the compost pile. This is the cheapest disease control in the entire rose calendar.

Time it off the first hard freeze, not a date on the calendar

Every failed winterizing job I have seen came from doing it too early. Mounding a rose in October, while the soil is still warm and wet, does three things you do not want. It keeps the crown warm enough to stay half awake, it holds moisture against the bud union so it rots, and it builds a snug hotel for voles that will spend February chewing the bark off the canes.

Wait for these signals, in this order:

1. The rose has dropped most of its leaves or you have stripped them.
2. You have had two or three nights at 28°F or below.
3. The top inch of soil crusts over and stays firm in the morning.

Then mound. In practice that is late November in zone 5, early to mid December in zone 6, and in zone 7 it may be January or not at all. If you want the temperature definitions behind that 28°F line, they live on our page about how to protect plants from frost, which sorts frost from a freeze from a hard freeze. This page assumes you know the difference and starts from the hard freeze.

The reason the timing matters more for roses than for most plants is the freeze-thaw cycle. A rose that is uniformly frozen at 20°F all winter is perfectly happy. A rose that goes 15°F, then 50°F, then 12°F, then 45°F is being repeatedly told to wake up and then killed back, and each cycle costs it stored energy. Everything below is really about damping that swing, not about adding warmth.

How to protect roses in winter: the four methods that work

1. Mounding, the default everywhere

Bring in 10 to 12 inches of loose soil, finished compost, or a compost and bark blend, and pile it over the crown in a cone. The key word is bring in. Do not scrape soil from around the plant, because that exposes the surface roots you are trying to insulate. Buy or barrow the material from elsewhere in the yard.

Aim to cover the bud union and the bottom 6 to 8 inches of every cane. Firm it lightly so wind does not blow it off, but do not pack it down like clay. Once that mound has frozen solid, you can throw a foot of shredded leaves or straw on top of it for a second layer. That order matters: soil first, freeze, then the fluffy layer. Fluffy material against the crown before it freezes traps moisture and rodents.

Shredded oak leaves are the best top layer because they stay open and do not mat. Whole maple leaves are the worst, because they pack into a wet mat that suffocates the crown. If all you have is maple, run the mower over the pile twice.

2. Collars, the tidier version

A collar is a cylinder of hardware cloth or chicken wire, 12 to 18 inches tall, set around the plant and filled with shredded leaves or compost. It does everything a mound does, holds its shape better on a slope, and comes apart cleanly in spring with no soil left behind in the bed.

Set the empty collar in place any time in fall, and fill it once the ground has begun to freeze. Wire mesh also keeps voles and rabbits off the canes in a way that a bare soil mound does not.

Foam rose cones are the mass market version of this, and they are the weakest option on the list. A sealed white cone on a sunny February day can reach 70°F inside while the soil is still frozen, which is the exact freeze-thaw whiplash you are trying to prevent. If you use one, cut four vent holes near the top, do not put it on until after a hard freeze, weight it down, and pull it off on any day above 50°F. Most gardeners are better served by a collar of leaves.

3. Wrapping and tying, for canes you need to keep

Mounding protects the crown and gives up on the canes above it. On climbers, on tall shrub roses you want to keep at height, and on anything trained on a structure, you need the canes themselves to survive.

Tie the canes into a loose bundle with soft twine so they cannot whip. Then wrap the bundle with burlap or a heavy garden fleece, leaving the top open so the plant can breathe and moisture can escape. Stuff dry shredded leaves down inside the wrap for insulation if you are at the cold edge of the variety's range. Then mound the base as usual, because the crown is still the thing that decides whether the plant lives.

Do not use plastic sheeting. It holds condensation against the bark and cooks the canes on sunny days. If you want the honest numbers on what a breathable cover does and does not buy you, our page on frost cloth for plants has the weight-by-weight breakdown; a heavy grade wrapped around a bundle of canes is doing the same job as a burlap wrap and is easier to handle.

4. The Minnesota tip, for zone 3 and 4 hybrid teas

If you insist on growing a grafted hybrid tea where winter lows hit -25°F, the only method with a real success rate is burying the entire plant. It is a strange thing to do the first time and it works.

In late fall, after dormancy: tie the canes into a bundle, dig a trench beside the plant roughly as long as the plant is tall, then push a spade in on the far side to sever some roots and loosen the root ball on one side. Tip the whole plant over into the trench so it lies flat, pin it down with landscape staples or a brick, and bury it under 4 to 6 inches of soil, then top with leaves once frozen. In spring you uncover it, stand it back up, and firm the soil around the roots. The plant hinges on the roots you left intact.

This is a real amount of work per plant, which is why zone 3 and 4 gardeners mostly grow Explorer, Parkland, and rugosa roses instead and skip the whole exercise.

Grafted versus own root: the distinction that changes everything

Look at the base of your rose. If there is a swollen knuckle where the canes flare out of the roots, it is grafted, and that knuckle is the bud union. Everything above it is the variety you paid for. Everything below is a tough rootstock, usually 'Dr. Huey' or a multiflora selection.

On a grafted rose, the bud union is the single point of failure. Kill it and the plant either dies or resprouts as the rootstock, which is how gardens end up full of a dark red once-blooming rose nobody planted. That is 'Dr. Huey' announcing that your hybrid tea died two winters ago. So on a grafted plant, the mound is not decorative. Its entire purpose is burying that knuckle.

An own root rose has no knuckle. The canes come straight out of the ground, and every bud below the soil line is the variety itself. If the top freezes to the ground, it resprouts as the same rose. That is why own root roses are the smarter buy in zone 5 and colder even though they take a year longer to size up. Most Knock Out, Drift, and Canadian series plants sold today are own root.

One practical note that follows from this: in zone 5 and colder, plant a grafted rose with the bud union 2 to 4 inches below the soil surface. In zone 7 and warmer, plant it at or slightly above the surface so it does not rot. Getting that right at planting time is worth more than a decade of mounding.

What Knock Out and other shrub roses need

Almost nothing, and this is the most common piece of overwork in home rose care.

Knock Out and its relatives are own root, hardy to zone 5, and bred specifically to be landscape plants that survive neglect. In zones 5 through 9 they need no mound, no cone, no wrap. Rake the leaves, stop deadheading in early fall, water until the ground freezes, and walk away. In zone 4 they will benefit from a loose 6 to 8 inch pile of shredded leaves over the crown, and they may still die back to that line, which is fine because they resprout from the base and bloom on new wood anyway.

A hybrid tea is the opposite animal. It is grafted, it is bred for flower form rather than toughness, and in zone 6 it wants the full mound every year. If you are running both in one bed, protect the hybrid teas and leave the shrub roses alone. They are not the same plant with a different label.

Climbers, ramblers, and tree roses

Climbers in zone 6 and warmer stay on the structure. Tie the canes securely so wind cannot flail them against the trellis, and mound the base. That is it.

Climbers in zone 5 stay on the structure but get their canes wrapped in burlap or heavy fleece, plus a mound at the base.

Climbers in zone 4 come down. Untie them, gather the canes into a bundle, lay them on the ground, pin them, and cover them with soil and then leaves. It is the Minnesota tip without the digging, and it is the only thing that reliably preserves the long canes that carry next year's flowers.

Ramblers are generally hardier than large flowered climbers and bloom on old wood, so preserving canes matters even more. Most rambler varieties handle zone 5 on the structure with a wrap.

Tree roses need the top graft protected, and there are only three ways to do that. In zone 6 and colder, either wrap the head thickly in burlap stuffed with leaves and wrap the standard stem too, or dig the whole plant, lay it on its side and bury it, or grow it in a container and move the container into an unheated garage for the winter. The container route is why most tree roses in cold climates live in pots. The head is a graft sitting in open air at the height where cold settles, and no amount of mulch at ground level reaches it.

Roses in pots

A container rose has no ground warmth under it, and the whole root ball can freeze solid and stay frozen. Pick one:

• Unheated garage or shed. The best option. Move the pot in after the plant is dormant and after a hard freeze, water it about once a month so the root ball never goes bone dry, and bring it back out when the hard freezes end. Dark is fine; the plant is asleep.
• Sink the pot. Dig a hole in a garden bed and drop the whole pot in up to the rim, then mulch over the top. The soil does the insulating.
• Group and wrap. Push all the pots together against a north or east wall, out of winter sun, pack shredded leaves between and around them, and wrap the outside of the group with burlap. This is the weakest of the three but works down to about zone 6 for a hardy shrub rose.

Terra cotta and ceramic pots crack when a saturated root ball freezes and expands. If the pot is staying outside, it needs to be plastic, resin, or fiberglass.

While you are out there: hostas and the rest of the bed

Hostas are the other plant people ask about in the same weekend, and they need far less than roses. Wait until frost has turned the foliage yellow and limp, then cut it to about two inches from the crown and remove it from the bed, because that decaying foliage is where slug eggs and hosta crown rot overwinter. Do not cut hostas back while the leaves are still green; the plant is still moving energy into the crown.

Established in-ground hostas need no winter cover at all in zones 3 through 8. What they benefit from is a 2 to 3 inch layer of shredded leaves applied after the ground has frozen, for the same freeze-thaw reason as roses, which prevents the crowns from heaving out of the soil in a warm February. Potted hostas are the exception and follow the potted rose rules above: garage, sink the pot, or group and wrap. For depths and material choices on that mulch layer, see our mulch guide.

The zone by zone plan

Two footnotes to that table. Reliable snow cover upgrades you by roughly a zone, because 12 inches of settled snow is better insulation than anything you can buy, so a zone 4 garden that is buried from December to March is effectively zone 5 at the crown. And a windy, exposed site downgrades you by roughly half a zone, because wind strips both snow and moisture.

Spring: when and how to uncover

Uncovering too early is the mirror image of covering too early, and it is more damaging, because you expose swelling buds to a late hard freeze.

The signal is not a date. It is when the hard freezes are done and daytime temperatures are running consistently above the 40s, which in most gardens lines up with forsythia blooming and daffodils opening. Buds on the canes will be swelling and showing red.

Take it off in stages, not all at once:

1. Pull the loose leaf or straw layer off first, on a cloudy day if you can, and leave it in the row so you can rake it back over if a freeze is forecast.
2. Wait a week. Let the crown adjust to light and air.
3. Then pull the soil mound down and spread it out into the bed.
4. Wait until you can see where the live green wood ends before you prune. Winter dieback is not always obvious in March, and cutting to a bud that turns out to be dead means going back a second time.
5. Prune once buds are clearly swelling: cut to live white pith, at an outward facing bud, and remove anything dead, thin, or crossing.
6. Feed only after you prune and after growth has started, not before.

If a hard freeze is forecast after you have uncovered, throw the leaves back or drape frost cloth over the plants for the night. A rose with swelling buds is far more vulnerable than the same rose was in January.

Frequently asked questions

When should I stop deadheading roses in the fall?

Stop about four to six weeks before your average first frost. Leaving the last flush of flowers to form hips signals the plant to stop producing new growth and start hardening its canes for winter. In zone 5 that means stopping in early September, in zone 6 mid September, and in zone 7 late September into early October.

How much soil should I mound over roses?

Ten to twelve inches over the crown, enough to bury the bud union and the bottom 6 to 8 inches of the canes. Bring the soil or compost in from elsewhere rather than scraping it from around the plant, which would expose the surface roots. In zone 4 go to a full 12 inches, and in zone 7 four to six inches is plenty in the years you bother at all.

Do Knock Out roses need winter protection?

Not in zones 5 through 9. They are own root, hardy to zone 5, and bloom on new wood, so even a hard dieback resprouts and flowers the same season. In zone 4, pile 6 to 8 inches of shredded leaves over the crown after the ground freezes and expect the canes to die back to that line.

When is it too late to winterize roses?

There is no hard cutoff, and later is safer than earlier. If you missed the ideal window and the ground is already frozen, you can still pile shredded leaves or compost over the crown; it will do less than a proper mound but it still evens out the freeze-thaw swings for the rest of winter. What you cannot do usefully is mound in early October while the soil is warm.

Should I use a foam rose cone?

Only with vents cut in it, only after a hard freeze, and only if you will pull it off on warm days. A sealed cone in late winter sun can heat to 70°F inside while the ground is still frozen, which wakes the plant into a killing freeze. A wire collar filled with shredded leaves does the same job with none of the risk.

How do I protect climbing roses in winter?

Zone 6 and warmer, tie the canes tightly to the structure so they cannot whip in the wind and mound the base. Zone 5, tie them, then wrap the bundled canes in burlap or heavy fleece and mound the base. Zone 4, untie them completely, lay them on the ground, pin them down and bury them in soil and leaves.

When do I uncover roses in spring?

When hard freezes are done and days are consistently in the 50s, which usually coincides with forsythia blooming. Remove the loose leaf layer first, wait a week, then pull the soil mound down. Keep the leaves nearby so you can re-cover if a late freeze is forecast, because swelling buds are far more tender than dormant canes.

Can I prune roses before winter?

Only to shorten canes over about four feet so wind cannot rock the plant, and that is a stability cut rather than a pruning cut. Full pruning belongs in spring, once you can see which wood survived. Fall pruning opens wounds that will not heal and can push soft growth that dies back through the graft.