How to Winterize Roses: A Checklist by USDA Zone
How much winter care a rose needs depends on the rose and your zone. Hardy shrub roses need little, while grafted hybrid teas in cold zones need a real mound.
To winterize roses, stop fertilizing by about mid-August, stop deadheading in early fall, clean up fallen leaves, and water if the fall is dry. In cold zones, wait for several hard frosts, then mound 10 to 12 inches of soil or compost over the base of tender and grafted roses. In mild zones, you can skip the mound for most roses and simply clean up and prune at the usual time.
First, identify your rose
Two questions decide how much work you have ahead:
- Is it hardy where you live? Rugosas, many shrub roses and hardy series such as the Canadian Explorers are bred for cold and rarely need more than light mulch. Many hybrid teas, floribundas and grandifloras are less hardy.
- Is it grafted? Look for a knobby swelling at the base where the canes emerge. That’s the graft union, or bud union. It is vulnerable to cold, and if it dies, the rose you bought dies with it. Own-root roses can regrow true from the roots.
As Penn State Extension puts it, the bigger the gap between a rose’s hardiness and your garden’s zone, the more protection it needs. Exposed, windy sites need more as well.
Winter care checklist by USDA zone
Zone bands are a guide, and local extension advice takes priority. Timing follows your frosts, not the date.
| Zone | Hardy shrub roses | Grafted or tender roses | Climbers |
|---|---|---|---|
| 3–4 | Mulch after the first hard frost; prune only dead or diseased wood | Cut to about 24 to 30 inches, then mound 8 to 12 inches of soil or compost. For the very tender, consider the Minnesota Tip | Hardy climbers: tie canes firmly against wind. Tender ones: lay down and bury, or wrap in straw and burlap |
| 5–6 | Light mulch; usually nothing else | Mound about 12 inches, covering the graft union, after several killing freezes; add leaves, boughs or bark on top once frozen | Tie canes loosely; wrap on exposed sites |
| 7 | Cleanup only | Optional: 5 to 6 inches of mulch over the graft union, or 10 to 12 inches of soil for tender roses | Tie canes against wind |
| 8–10 | Cleanup only | Mounding generally isn’t needed; keep regular mulch and cover plants only for an unusual freeze | Tie loose canes; no wrapping |
Step by step
- Stop feeding in late summer. Washington State University and University of Illinois Extension both point to about August 15 as the cutoff, because late feeding produces soft growth that winter damages. Mild zones can run later. A North Carolina extension office makes its last application in early October.
- Stop deadheading in early fall. Letting hips form helps signal that the season is over.
- Clean up. Rake fallen leaves and old mulch from under the plant, because disease spores overwinter there. Don’t compost diseased leaves, as our guide to rose black spot explains.
- Water if it’s dry. Give the soil a deep watering after the first frost and before the ground freezes. Water the soil, not the foliage.
- Shorten only what could whip around. Cut extra-long canes on bush roses so winter wind doesn’t rock the plant. The University of Missouri suggests taking tall canes back by about two-thirds and removing weak, thin canes. Save real pruning for late winter or spring.
- Tie climbers. Tie canes loosely to their support or to each other to limit movement in wind.
- Mound the crown at the right time. Wait until after several hard frosts. University of Missouri Extension warns that mounding too early keeps stems warm and moist, which encourages cankers. Most sources want the mound in place before the ground freezes solid, while University of Minnesota guidance for hybrid teas places it once the ground freezes.
- Bring in fresh material. Use compost or soil from elsewhere in the garden. Kansas State University warns against scraping soil from around the rose, which exposes its roots.
- Top the mound. Once it has frozen, add a few inches of leaves, evergreen boughs or ground bark. A wire ring helps hold it together. More on timing is in our guide to winter mulch.
Roses in containers
Pots freeze faster than the ground. Penn State suggests wrapping the pot and rim in bubble wrap or setting a ring of fencing around it and filling that with leaves or straw. Another option is burying a small pot in the garden once the rose is dormant and before the ground freezes.
What about the Minnesota Tip?
This method protects tender roses in the coldest zones. You prune the bush to about 18 inches, tie the canes, dig a trench, loosen the roots on one side, lay the plant down and bury it. Oregon State University calls it very effective but labor-intensive. It makes sense only for a treasured rose that wouldn’t otherwise survive. Replacing it with a hardy shrub rose may be easier.
What to skip in mild zones
- Mounding hardy shrub roses
- Wrapping canes or building cages
- Trenching or burying plants
- Hard pruning in November, which is best left to February in zone 7 and warmer, according to North Carolina extension advice
Penn State notes that a rose bred for zone 4 needs little to no protection in a zone 7b garden. Keep the disease cleanup, though, because it matters in every zone.
Taking it off in spring
Penn State suggests removing protection once early spring has warmed and forecast lows stay above 20°F. Work gradually, as the lower layers may stay frozen for a while. Spread the compost around the bed, then prune. Don’t rush, because late-winter dieback can continue after an early start. If canes look dead, see how to check for live wood.
Bottom line
Plant hardy roses and winter care nearly takes care of itself. For grafted or tender roses in cold zones, stop feeding by mid-August, clean up well, and mound the crown after several hard frosts. In mild zones, stick to cleanup, water and normal mulch.
FAQ
When should I cut back roses for winter?
Only shorten long canes in fall to prevent wind rock. Do the main pruning in late winter or spring, depending on your zone.
Should I cover roses with a tarp or plastic?
No. Trapped moisture and warmth can cause more harm than cold. Use loose soil, compost, leaves or straw instead.
How deep should a rose mound be?
About 10 to 12 inches, enough to cover the graft union. Penn State suggests covering the union by about a foot on grafted roses.
Do modern landscape shrub roses need winterizing?
Most modern landscape shrub roses need no mounding where they’re rated hardy. Clean up leaves, water in a dry fall, and prune in late winter or early spring.
