Yes — Strong Match
ironweed (fasciculata) (zones 4-8) covers every zone New York contains (4a-7b), so hardiness is not what limits it anywhere in the state.
Ironweed Fasciculata in New York — the short answer
Ironweed Fasciculata in New York: hardy in zones 4–8, full sun.
- Plant zones
- 4-8
- Not verified
- New York zones
- 4a-7b
- USDA PHZM 2023
- Frost window
- Apr 13 - Apr 29 – Oct 18 - Nov 5
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 136 days
- NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — per-field provenance varies and is published with the dataset.
Your yard isn't the whole zone.
New York spans zones 4a-7b, 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 ironweed fasciculata against your parcel's actual hardiness, soil, and sun.
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New York is not one climate
New York’s winter-low ladder runs across 62 counties, from zone 4 in Essex County to zone 7.5 in Richmond County. That is 35°F between the two counties’ average coldest night — the difference between ironweed fasciculata overwintering in the ground and coming under cover.
The middle half of 62 counties runs 5.5–6.5 zones, with a median of 6 zones — a 3.5-zone span end to end.
Measured across 62 New York counties. USDA PHZM 2023, per county. Quartiles are order statistics — every figure shown is a value a real county recorded, not an interpolation. Your own site sits somewhere inside this range; a parcel report resolves where.
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 ironweed fasciculata (USDA PHZM 2023):
Zone Comparison
Ironweed Fasciculata Needs
- USDA Zones: 4-8
- Sun: Full SunWe haven't confirmed this against a published source yet.
- Mature size: 5 ft tallWe haven't confirmed this against a published source yet.
- Picking window: ~30 days of harvestWe haven't confirmed this against a published source yet.
- Drought tolerance: MediumWe haven't confirmed this against a published source yet.
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 4-8)
Preferred Soil pH
We haven't confirmed this against a published source yet.
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS, and university Extension sources — per-field provenance varies and is published with the dataset. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Ironweed Fasciculata 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.
Winter standing
New York runs as cold as USDA zone 4, and no sourced winter-hardiness floor is on record for ironweed fasciculata, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether ironweed fasciculata is a permanent planting or a replant-every-spring crop for you turns on your own zone within New York; check its hardiness range against that before treating it as long-lived ground.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: Growable Ground Plant Database — frost-free days from FAO ECOCROP, days to harvest from university Extension production guides, and growing-degree-day and chill-hour minimums that are compilation estimates rather than published figures. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Soil + Drainage Fit
Ironweed Fasciculata likes near-neutral soil (pH 5-7.5). That's the common-ground band across New York's glacial till and silt loam — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 5.5 and 7 — worth knowing before you decide whether a New York soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your New York site is heavier clay or sits in a low spot, a raised bed lifts the roots above wet ground, or work in compost. pH range, preferred pH and drainage need: We haven't confirmed this against a published source yet.
Plant pH requirements: FAO ECOCROP and USDA PLANTS, with the remaining rows from other published sources or Growable Ground compilation. Drainage: FAO ECOCROP, with the remaining rows from other published sources or Growable Ground compilation. New York soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Ironweed Fasciculata 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 ironweed fasciculata — is covered on the New York growing guide.
Where in New York Ironweed Fasciculata Is Zone-Hardy
Ironweed Fasciculata is rated for USDA zones 4–8. Every one of New York’s 62 counties sits inside that band — from Essex County at zone 4a to Richmond County at zone 7b — so winter cold is not what decides this plant anywhere in the state. What is left to vary is your own parcel: slope, shelter and cold-air drainage routinely move a site half a zone either way from the county figure.
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 ironweed fasciculata 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". Ironweed Fasciculata’s zone 4–8 band: Not verified. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Pollinator + Wildlife Value
Ironweed Fasciculata draws honeybees, native bees, and butterflies (high value). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, ironweed fasciculata can only work that bloom inside New York's frost window — roughly 185 days, opening after the last 28°F freeze (Apr 13 - Apr 29) and closing at the first (Oct 18 - Nov 5), per NOAA Regional Climate Centers ACIS, 1991-2020. Pollinator value: We haven't confirmed this against a published source yet.
New York Cooperative Extension
For New York-specific cultivar recommendations, planting calendars, and pest pressure for ironweed fasciculata, the canonical source is Cornell Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Ironweed Fasciculata native to New York?
The USDA PLANTS Database (accessed 2026-10-19) lists Ironweed Fasciculata as native to the Lower 48 and records it growing in New York, but it does not say whether those New York plants are native or introduced. Your state's native plant society or Cooperative Extension can tell you whether it is part of the local flora.
State records: USDA PLANTS Database state-distribution data (presence, not state-level nativity), accessed 2026-10-19.
Common Questions About Growing Ironweed Fasciculata in New York
When can I plant Ironweed Fasciculata 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). No sourced winter-hardiness floor is on record for Ironweed Fasciculata, so this page does not state whether it overwinters in New York and publishes no fall establishment date for it — check its hardiness range against your own zone before treating it as a permanent planting.
What hardiness zone is Ironweed Fasciculata grown in across New York?
New York spans USDA hardiness zones 4a-7b (USDA ARS PHZM 2023). Ironweed Fasciculata carries a range of zones 4-8, 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). Ironweed Fasciculata needs 365+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Ironweed Fasciculata native to New York?
The USDA PLANTS Database (accessed 2026-10-19) lists Ironweed Fasciculata as native to the Lower 48 and records it growing in New York, but it does not say whether those New York plants are native or introduced. Your state's native plant society or Cooperative Extension can tell you whether it is part of the local flora.
How should I amend the soil for Ironweed Fasciculata in New York?
Ironweed Fasciculata prefers pH 5-7.5 and well (dry spells) drainage. We haven't confirmed this against a published source yet. That sits in the common-ground band across New York soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Ironweed Fasciculata actually grow on my specific land in New York?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores ironweed fasciculata against your address's mapped 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 ironweed fasciculata against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that New York ironweed fasciculata averages can't show:
We read public map data around New York — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New York ironweed fasciculata average
Explore More
Growing guides for ironweed fasciculata
Explore New York county by county
New York carries 62 counties with their own USDA zone — a sample of the growing pages for ironweed fasciculata there:
Where else ironweed fasciculata grows
Ironweed Fasciculata's zone band crosses state lines — these are the states closest to New York in winter climate where it also has a page, plus the far ends of its range. Each one re-answers the question with that state's own record.
More to grow in New York
New York has a growing page for 889 plants — a rotating sample of the rest of the shelf.
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