Generally — Most Areas
autumn fern (zones 6-8) suits most of New York (4a-7b) — zones 6-7 are in range, and the rest of the state is the exception.
Your yard isn't the whole zone.
New York spans zones 4a-7b, but your yard has its own microclimate — slope, trees, and low spots shift frost and sun across a single parcel. Enter your address and we'll score autumn fern against your land's actual soil, sun, and frost.
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Zone Comparison
Autumn Fern Needs
- USDA Zones: 6-8
- Sun: Part Sun
- Mature size: 2 ft tall
- Drought tolerance: Low
New York Has
- USDA Zones: 4a-7b
- Last Hard Freeze (28°F): Apr 13 - Apr 29
- First Hard Freeze (28°F): Oct 18 - Nov 5
- Annual Rainfall: 30-50 inches
- Common Soils: Glacial till, Silt loam, Clay loam
Plant Zone Range (zones 6-8)
Plant data: USDA PLANTS Database / Growable Ground plant catalog. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Autumn Fern in New York
The frost window
Across New York, the last spring hard freeze (28°F) clears between Apr 13 and Apr 29, and the first fall hard freeze lands between Oct 18 and Nov 5 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 172-day window you can count on — up to 206 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
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.
Soil + Drainage Fit
Drainage requirement: poorly (saturated >50% of year). A soil-survey lookup (NRCS SSURGO) flags whether your specific site matches.
Plant pH and drainage requirements from USDA PLANTS Database. New York soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Autumn Fern in New York — Quick Answer
- Verdict: Generally — Most Areas
- Plant Zones: 6-8 (USDA PLANTS Database)
- State Zones: 4a-7b (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Apr 13 - Apr 29 to Oct 18 - Nov 5 (NOAA Regional Climate Centers ACIS, 1991-2020)
What Else to Consider for Autumn Fern in New York
Zone compatibility tells you about winter cold survival — but New York growers also need to think about:
Short upstate growing season (100-140 frost-free days in Adirondacks)
Heavy clay soils in western NY require drainage improvement
Late spring frosts through May in higher elevations
Deer browse pressure is heavy in suburban and rural areas
What to actually do about these — and the constraints that apply to every New York grower, not just autumn fern — is covered on the New York growing guide.
Where in New York Autumn Fern Is Zone-Hardy
Autumn Fern is rated for USDA zones 6–8. 33 of New York’s 62 counties fall inside that band. The coldest that does is Broome County at zone 6a. 29 counties sit below the plant’s zone 6 floor, where an unprotected plant is relying on snow cover and a mild year. Where you are in New York decides this one.
Across those 62 counties New York’s winter-low ladder runs from zone 4a in Essex County to zone 7b in Richmond County — 3.5 USDA zones of spread, which is 35°F between the two counties’ average coldest night of the year. That is why a statewide hardiness answer is where you start and not where you finish.
The planting window moves with it. Hamilton County holds its last hard freeze (28°F) until about May 19, while Bronx County is clear by Mar 19 — 61 days apart. Set autumn fern out on your county’s date, not the state’s.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. County last-freeze dates: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F killing freeze — earlier than the folk 32°F "last frost". Autumn Fern’s zone 6–8 band: USDA PLANTS / Growable Ground plant database. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Where in New York Fits Best
Even within New York's zones 4a-7b, county microclimates differ enough to change what thrives. These counties carry the closest zone match for autumn fern (USDA PHZM 2023):
New York Cooperative Extension
For New York-specific cultivar recommendations, planting calendars, and pest pressure for autumn fern, the canonical source is Cornell Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Autumn Fern in New York
When can I plant Autumn Fern in New York?
New York's last spring hard freeze (28°F) clears between Apr 13 and Apr 29, and the first fall hard freeze lands between Oct 18 and Nov 5 (NOAA Regional Climate Centers ACIS, 1991-2020). Time outdoor planting to after the last hard freeze for your specific site — a further two to three weeks for anything tender — and count back from those dates for transplant scheduling.
What hardiness zone is Autumn Fern grown in across New York?
New York spans USDA hardiness zones 4a-7b (USDA ARS PHZM 2023). Autumn Fern carries a range of zones 6-8, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical New York site have?
A typical New York site sees ~185 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Autumn Fern should be matched against that window, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Will Autumn Fern actually grow on my specific land in New York?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores autumn fern 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 New York
State-level data is a sketch. Your Growable Ground report scores autumn fern against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that New York autumn fern averages can't show:
We read public map data around New York — soil, climate, flood, and parcel records. How we handle your address.
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Growing guides for autumn fern
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