Conditional — Some Areas
swamp rose (zones 4-9) has limited zone overlap with Ohio (5b-6b). Only zones 5-6 in the state are suitable.
Your yard isn't the whole zone.
Ohio spans zones 5b-6b, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score swamp rose against your parcel's actual hardiness, soil, and sun.
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Zone Comparison
Swamp Rose Needs
- USDA Zones: 4-9
- Soil pH: 5 - 7.5
- Sun: Full Sun
- Drainage: well (dry spells)
- Frost-Free Days: 110+
Ohio Has
- USDA Zones: 5b-6b
- Last Frost: Apr 15 - May 15
- First Frost: Sep 30 - Oct 30
- Annual Rainfall: 34-42 inches
- Common Soils: Glacial till, Clay loam, Silt loam
Plant Zone Range (zones 4-9)
Preferred Soil pH
Plant data: USDA PLANTS Database / plant_species_v5.csv. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Swamp Rose in Ohio
The frost window
Across Ohio, the last spring frost clears between Apr 15 and May 15, and the first fall frost lands between Sep 30 and Oct 30 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 138-day window you can count on — up to 198 days on a mild site in a kind year.
Establishment timing
As a long-lived plant, swamp rose isn't racing the calendar to a harvest date. Plant it in spring once the last-frost window passes so roots settle in through the full season, or in early fall while the soil still holds summer warmth.
Timing tuned to sub-state frost dates — Geauga County, not the statewide average.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
Zone compatibility says you can survive winter here. Whether the growing season is long enough — and warm enough — is a different question.
Frost-free days
Swamp Rose wants 110+ frost-free days; a typical Ohio site sees ~190 (NOAA Climate Normals). That leaves comfortable headroom for succession planting.
Chill hours
Swamp Rose requires ~400 chill hours (32-45°F dormancy window). Ohio typically banks ~1350 chill hours per winter (MSU Extension method), which keeps this plant on track.
Climate aggregates derive from USDA NRCS county-level hardiness data + Cornell CALS Extension GDD-by-region tables + MSU Extension chill-hours-by-zone (1991-2020 NOAA Climate Normals baseline).
Soil + Drainage Fit
Swamp Rose likes near-neutral soil (pH 5-7.5). That's the common-ground band across Ohio's glacial till and clay loam — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Ohio site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
Ohio's soils run mostly silt loam, but SSURGO maps the series, texture, and drainage under your exact parcel — that map unit, not the state average, decides how swamp rose performs.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. Ohio soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Swamp Rose in Ohio — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 4-9 (USDA PLANTS Database)
- State Zones: 5b-6b (USDA ARS PHZM 2023)
- Growing Season: Apr 15 - May 15 to Sep 30 - Oct 30 (NOAA Climate Normals)
What Else to Consider
Zone compatibility tells you about winter cold survival — but Ohio growers also need to think about:
Heavy clay soils across much of northern Ohio require amendment for drainage
A raised bed fixes the drainage in one weekend — and amended clay repays the effort as some of the richest soil there is.
Variable spring weather with late frost risk through mid-May
Watch your local last-frost normal, not the region's — holding tender plants two extra weeks beats replanting a bed.
Japanese beetles and tomato hornworms are common garden pests
Hand-pick early, row-cover young plants, and skip broad sprays — extension IPM guides keep the beneficial insects on your side.
Wet springs can delay planting and promote root rot
Raised or mounded rows shed spring water and warm earlier — where puddles linger, drainage is the first project worth doing.
Growing swamp rose here specifically
Swamp Rose needs pH 5.0–7.5; Ohio's dominant silt loam soils may or may not deliver that, so your parcel's SSURGO map unit is the real test.
Start with a soil test on your own ground and adjust pH and texture to fit swamp rose's 5.0–7.5 range. How to handle it →
Timing shifts within Ohio
Ohio isn't one climate. In Geauga County, the last hard freeze (28°F) holds until about Apr 4 — roughly 11 days later than the recorded state median — so plant swamp rose to your county's window, not the statewide date.
County last-freeze dates: NOAA/PRISM Climate Normals 1991-2020, 28°F threshold (earlier than the folk 32°F "last frost"). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Swamp Rose draws pollinators (high value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Ohio Cooperative Extension
For Ohio-specific cultivar recommendations, planting calendars, and pest pressure for swamp rose, the canonical source is Ohio State University Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Swamp Rose native to Ohio?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Swamp Rose as native to Ohio. Planting it supports the pollinators and wildlife that evolved alongside it.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Swamp Rose in Ohio
When can I plant Swamp Rose in Ohio?
Ohio's last spring frost clears between Apr 15 and May 15, and the first fall frost lands between Sep 30 and Oct 30 (NOAA Climate Normals 1991-2020). Swamp Rose is a long-lived planting, so target spring just after your local last frost — or early fall while the soil holds warmth — and let it establish through the season.
What hardiness zone is Swamp Rose grown in across Ohio?
Ohio spans USDA hardiness zones 5b-6b (USDA ARS PHZM 2023). Swamp Rose carries a range of zones 4-9, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Ohio site have?
A typical Ohio site sees ~190 frost-free days per year (derived from NOAA Climate Normals 1991-2020). Swamp Rose needs 110+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Geauga, the freeze-free season runs shorter than the state average, so verify your own county's window.
Is Swamp Rose native to Ohio?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Swamp Rose as native to Ohio. Planting it supports the pollinators and wildlife that evolved alongside it.
How should I amend the soil for Swamp Rose in Ohio?
Swamp Rose prefers pH 5-7.5 and well (dry spells) drainage (USDA PLANTS Database). That sits in the common-ground band across Ohio soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Swamp Rose actually grow on my specific land in Ohio?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores swamp rose against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Ohio
State-level data is a sketch. Your Growable Ground report scores swamp rose against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →