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Rose planting zones

Rose covers 3a–10a, but the zone is only half the answer. Of the 8 types below, 1 carries its flower display through the spring freeze window and 7 do not. That difference decides whether a late freeze costs you a season of flowers.

Published October 23, 2026 · Updated October 29, 2026 · Cite this page

The types

Which rose you are choosing between

Type Zones A late freeze
Canadian Explorer roses Rosa (e.g. ‘John Cabot’, ‘William Baffin’) 3a to 7b, then too hot Safe Minnesota calls them exceptionally hardy (zone 3) and disease-resistant. The climbers among them need tying in, not shaping.
Parkland roses Rosa ‘Winnipeg Parks’ 3a to 7b, then too hot Safe Bred for prairie climates. Minnesota says ‘Winnipeg Parks’ dies back to the crown in winter and recovers quickly in spring.
Rugosa hybrid Rosa ‘Rotesmeer’ (Purple Pavement) 3a to 7b, then too hot Safe Repeat-blooming and fragrant. Minnesota calls rugosas nearly indestructible and tolerant of poor soil and road salt.
‘Nearly Wild’ Rosa ‘Nearly Wild’ 4a to 9b, then too hot Safe Single pink flowers on its own roots; Minnesota says it dies back to the crown most winters but renews quickly.
‘Carefree Delight’ Rosa ‘Carefree Delight’ 4a to 7b, then too hot Safe Blooms throughout the season, Minnesota says, but needs winter protection there.
Knock Out roses Rosa (e.g. Double Knock Out, Pink Knock Out) 5a to 10a, then too hot Safe Both named Earth-Kind roses by Texas A&M AgriLife, Double Knock Out in 2025 and Pink Knock Out in 2026.
Hybrid tea, floribunda and English roses Rosa (modern repeat-blooming hybrids) 6a to 9b, then too hot Safe Repeat bloomers on new wood. In Minnesota they need their crowns protected through winter.
Once-blooming climbers and old roses Rosa (spring-flowering) 5a to 9a, then too hot Exposed Penn State puts spring-flowering roses among the shrubs that bloom on old wood, so their buds stand through the freeze window.

Zone ranges and bloom habit are a judgement — horticultural convention, not a measurement, and the same standing as the heat ratings on our crop tables. Everything below this panel is measured.

Zone by zone

Which roses are hardy where, and when the freeze lands

The two left columns come from the variety table above — a judgement. The two right columns are measured: they are the median last spring freeze across every NOAA station the zone’s ZIP codes actually cite, and how much later the one-year-in-ten freeze arrives.

Zone Hardy here Flowers exposed Last spring freeze 1 year in 10
3a 3 of 8 none only 10 stations — too few to publish a range
3b 3 of 8 none May 12 – May 30 across 92 stations about 14 days later
4a 5 of 8 none May 6 – May 27 across 298 stations about 14 days later
4b 5 of 8 none May 2 – June 1 across 477 stations about 14 days later
5a 7 of 8 1 April 28 – May 31 across 718 stations about 14 days later
5b 7 of 8 1 April 22 – May 28 across 752 stations about 15 days later
6a 8 of 8 1 April 18 – May 24 across 1004 stations about 16 days later
6b 8 of 8 1 April 11 – May 19 across 991 stations about 16 days later
7a 8 of 8 1 April 5 – May 9 across 941 stations about 17 days later
7b 8 of 8 1 March 30 – April 26 across 679 stations about 16 days later
8a 4 of 8 1 March 20 – April 16 across 689 stations about 17 days later
8b 4 of 8 1 March 7 – April 17 across 700 stations about 19 days later
9a 4 of 8 1 February 15 – April 6 across 446 stations about 22 days later
9b 3 of 8 none February 2 – April 6 across 218 stations about 27 days later
10a 1 of 8 none 152 of 190 stations here record no ordinary spring freeze, so no date speaks for the zone

“Hardy here” and “flowers exposed” are a judgement, from the variety table above. The freeze dates are measured — NOAA 1991–2020 climate normals, and the range is across the stations the zone’s own ZIP codes cite rather than one station chosen to speak for it.

Why the date matters

Your zone does not tell you your last freeze

Across the 13 zones above that publish a range, the median last spring freeze varies by 34 days inside a single zone — 18 days even in the tightest, zone 3b, and 63 in the widest, zone 9b. Two gardens with the same zone on the label can be a month apart on the date that decides whether roses flower.

And the median is not the risk. Across the 6,194 NOAA stations serving these zones, the freeze that arrives one year in ten lands a median of 16 days after the median date, and 22 days after it at the tenth of stations where that tail runs longest. A variety marked exposed above has its flowers standing in front of that whole window, not in front of one date.

⛔ We publish no temperature at which a bud is lost. NOAA’s normals give dates, not damage thresholds, and inventing a number to bridge the two is the one thing this site refuses everywhere else. What is on this page is when the freeze arrives and which flowers are out when it does.

Which roses for your zone

University of Minnesota Extension’s “sure bets” for a cold climate are hardy shrub roses: Canadian Explorer roses, which it calls exceptionally hardy (zone 3) and disease-resistant; the compact Parkland series, bred for prairie climates; Northern Accents, developed at the University of Minnesota (‘Sven’, ‘Ole’ and ‘Lena’); and rugosa roses, nearly indestructible and tolerant of poor soil and road salt.

For classic rose form without, as Minnesota puts it, the winter drama, it suggests Easy Elegance roses (hybrid-tea looks with shrub-rose toughness), Knock Out roses (long-blooming and low-maintenance) and ‘Carefree Beauty’, a Buck rose developed at Iowa State University. Minnesota has taken part in the American Rose Trials for Sustainability since 2015, which identifies roses that perform under minimal input.

RoseZones (University of Minnesota)Note
‘Winnipeg Parks’ (Parkland) 3–7Dies back to the crown in winter; recovers quickly in spring
‘Purple Pavement’ 3–7Fragrant, semi-double, repeat blooms
‘Nearly Wild’ 4–9Dies back to the crown most winters; renews quickly
‘Carefree Delight’ 4–7Blooms throughout the season; requires winter protection

Earth-Kind roses for Texas

Earth-Kind is a Texas A&M AgriLife Extension designation for roses that perform well with fewer resources under Texas heat, drought and variable soils. Pink Knock Out is a 2026 selection and Double Knock Out a 2025 one. Texas A&M notes that some roses struggle with black spot in Texas heat and humidity, while Earth-Kind selections show high disease resistance. The full list is on the Earth-Kind program site.

Planting

Minnesota says fall is a great time to plant, because cool weather and warm soil help roots establish quickly. Choose hardy shrub roses or winter-tolerant climbers, set the graft union 1 to 2 inches below soil level, water deeply, and mulch after the first hard frost. Planting grafts 1 to 2 inches deep is also its advice against cane dieback.

Pruning by type

Penn State’s rule is which wood the rose flowers on. Repeat-blooming roses flower on new wood and are pruned in late winter or very early spring, before new leaves; Clemson waits until the buds begin to swell. Spring-flowering roses flower on old wood and are pruned soon after they finish blooming. In fall, Minnesota removes only dead, diseased, damaged and crossing canes, and saves structural pruning for late April or early May.

Full guide: When and How to Prune Roses by Zone

Getting roses through winter

How much protection a rose needs depends on how its hardiness compares with your zone. University of Minnesota Extension says hardy shrub roses rarely need elaborate protection, while hybrid tea, floribunda and English roses need their crowns covered once the ground freezes; Penn State says insulate only after several killing freezes, once the rose is dormant.

Full guide: How to Winterize Roses by Zone: Mounding, Mulch, Timing

Rose diseases

University of Minnesota Extension says most hardy shrub roses resist the common diseases, and gives this handling for each:

DiseaseWhat you seeWhat to do
Black spot Dark leaf spots with yellowingRemove infected leaves, water at the base, improve airflow
Powdery mildew White coating on leavesPrune for airflow, water in the morning
Rose rust Orange pustules under leavesRemove affected foliage, avoid overhead watering
Cane dieback Stems brown from the tipsPrune to healthy tissue; plant grafts 1–2 inches deep
Botrytis blight Buds brown and fail to openRemove affected buds, improve air circulation

Common mistakes

We found no UF/IFAS source on roses, so Florida advice on this page is limited. For Florida, ask your county UF/IFAS Extension office.

Your ZIP code

Your ZIP, your answer

Enter your ZIP code to see your USDA zone, which of the 8 types on this page are rated for that zone and when its late-freeze window runs, read from the table on this page, and the freeze dates of the NOAA station nearest you.

Works for all 40,502 US ZIP codes. Freeze dates need a NOAA station within 100 km; where there is none, the page says so rather than estimating one. Your ZIP code stays in your browser: the page downloads the file of ZIP codes that share its first three digits and looks yours up there. It is not stored or tracked.

Your answer appears here.

Full details for any ZIP code: ZIP code zone finder.

Questions

What are the hardiest roses?
University of Minnesota Extension names hardy shrub roses: Canadian Explorer roses (zone 3), the Parkland series, Northern Accents and rugosa roses, which it calls nearly indestructible.
When should I prune roses?
Penn State Extension says prune repeat-blooming roses in late winter or very early spring, and spring-flowering roses soon after they bloom. In Minnesota, Extension says save structural pruning for late April or early May.
What is an Earth-Kind rose?
A Texas A&M AgriLife Extension designation for roses that perform well with fewer resources under Texas heat, drought and variable soils. Pink Knock Out was named in 2026 and Double Knock Out in 2025.
How do I stop black spot on roses?
University of Minnesota Extension says remove infected leaves, water at the base and improve airflow. Texas A&M AgriLife notes that Earth-Kind selections show high disease resistance where other roses struggle with black spot in Texas heat and humidity.
Can I plant roses in fall?
Yes. University of Minnesota Extension says fall is a great time to plant, because cool weather and warm soil help roots establish. Set the graft union 1 to 2 inches below soil level and mulch after the first hard frost.

Sources

Freeze dates on this page are NOAA 1991–2020 Climate Normals, for every station the ZIP codes in each zone cite. Zones are the USDA Plant Hardiness Zone Map, 2023. The type table is a judgement, as labelled above. Growing advice is quoted from the extension publications below, each written for its own area.

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Published October 23, 2026 · Updated October 29, 2026

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