Not Verified — Winters This Mild
Not verified for winters this mild: nagoonberry is listed for zones 1-5 — a growing recommendation, not a heat limit — and we hold no heat rating for it. Connecticut runs zones 6a-7b, milder than that range, so this page gives no verdict here. The frost window and season figures below are measured for Connecticut.
Nagoonberry in Connecticut — the short answer
Nagoonberry in Connecticut: listed for zones 1–5, full sun.
- Plant zones
- 1-5
- Hardy to zone 1a: USDA PLANTS Database lists -62 °F, converted to zone 1a, checked Oct 2026. Ceiling: not verified.
- Connecticut zones
- 6a-7b
- USDA PHZM 2023
- Frost window
- Mar 31 - Apr 11 – Oct 30 - Nov 3
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 191 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.
Connecticut spans zones 6a-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 nagoonberry against your parcel's actual hardiness, soil, and sun.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your parcel report in seconds — read in full free for your first 14 days
Connecticut is not one climate
Connecticut’s winter-low ladder runs across 9 counties, from zone 6 in Northwest Hills County to zone 7 in South Central Connecticut County. That is 10°F between the two counties’ average coldest night — the difference between nagoonberry overwintering in the ground and coming under cover.
The middle half of 9 counties runs 6.5–6.5 zones, with a median of 6.5 zones — a 1-zone span end to end.
Measured across 9 Connecticut 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 Nagoonberry Stands in Connecticut
Nagoonberry is rated for zones 1–5 — a cold floor USDA puts at -60 to -50°F. No Connecticut county sits inside it, so in open ground this is a grown-under-cover plant here rather than a bed plant — which is a statement about Connecticut winters, not about nagoonberry.
Above the zone 5 ceiling
9 counties
- Northwest Hills County · zone 6a
- Capitol County · zone 6b
- Lower Connecticut River Valley County · zone 6b
3 of 9 shown
Warmer than the zone 5 end of its range.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. A zone is a 10°F band of average annual extreme minimum temperature, so the floor above is the band the plant's rating denotes, not a single measured kill point. Slope, shelter and cold-air drainage routinely move a site half a zone either way from its county figure — which is the part only your address resolves.
Zone Comparison
Nagoonberry Needs
- USDA Zones: 1-5
- Sun: Full SunWe haven't confirmed this against a published source yet.
- Mature size: 6 in tallWe haven't confirmed this against a published source yet.
- Picking window: ~28 days of harvestWe haven't confirmed this against a published source yet.
- Drought tolerance: Low
Connecticut Has
- USDA Zones: 6a-7b
- Last Hard Freeze (28°F): Mar 31 - Apr 11
- First Hard Freeze (28°F): Oct 30 - Nov 3
- Annual Rainfall: 44-52 inches
- Common Soils: Glacial till, Sandy loam, River valley silt
Plant Zone Range (zones 1-5)
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 Nagoonberry in Connecticut
The frost window
Across Connecticut, the last spring hard freeze (28°F) clears between Mar 31 and Apr 11, and the first fall hard freeze lands between Oct 30 and Nov 3 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 202-day window you can count on — up to 217 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
Connecticut runs as cold as USDA zone 6, and no sourced winter-hardiness floor is on record for nagoonberry, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether nagoonberry is a permanent planting or a replant-every-spring crop for you turns on your own zone within Connecticut; 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
Nagoonberry tolerates a wide pH range (pH 4.5-7.8) — 3.3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Connecticut. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 5.5 and 6.5 — worth knowing before you decide whether a Connecticut soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Connecticut 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. Connecticut soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Before you plant nagoonberry for food
Anything you grow to eat takes up what is in the ground it grows in, so what is on record near you is worth knowing before nagoonberry goes in. What follows is Connecticut’s documented federal record at state scale — a screening signal, not a soil test, and not a statement about any one lot.
Safe to Grow Here?
What the federal record shows across Connecticut — and how to grow with it.
We checked the federal record across Connecticut — 11,437 documented sites across 7 of the 8 source types we track.
The most significant on record: 279 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Connecticut carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds of imported, lab-tested soil grow well almost anywhere in the meantime.
Sources Checked
across Connecticut
Severity Distribution
across Connecticut
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Connecticut, Superfund runs higher than the national average — 279 sites across Connecticut. That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Sources: EPA, USGS — 950K documented sites tracked nationwide across 8 federal source types.
What Else to Consider for Nagoonberry in Connecticut
Zone compatibility tells you about winter cold survival — but Connecticut growers also need to think about:
Rocky glacial soils require clearing and amendment
Short growing season in northern hills
Deer pressure is high in suburban areas
What to actually do about these — and the constraints that apply to every Connecticut grower, not just nagoonberry — is covered on the Connecticut growing guide.
Where in Connecticut Nagoonberry's Listed Zones Fall
Nagoonberry is rated for USDA zones 1–5. Every Connecticut county sits above it. Even Northwest Hills County, the state’s coldest at zone 6a, is milder than the plant’s zone 5 ceiling — the constraint here is winter chill it will not get, not cold it cannot take.
Across those 9 counties Connecticut’s winter-low ladder runs from zone 6a in Northwest Hills County to zone 7a in South Central Connecticut County — 1 USDA zone of spread, which is 10°F between the two counties’ average coldest night of the year. None of that range reaches the band nagoonberry needs, so here the statewide answer really is the answer.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. Nagoonberry’s zone 1–5 band: Hardy to zone 1a: USDA PLANTS Database lists -62 °F, converted to zone 1a, checked Oct 2026. Ceiling: not verified.. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Pollinator + Wildlife Value
Nagoonberry draws native bees (moderate value). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, nagoonberry can only work that bloom inside Connecticut's frost window — roughly 207 days, opening after the last 28°F freeze (Mar 31 - Apr 11) and closing at the first (Oct 30 - Nov 3), per NOAA Regional Climate Centers ACIS, 1991-2020. Pollinator value: We haven't confirmed this against a published source yet.
Connecticut Cooperative Extension
For Connecticut-specific cultivar recommendations, planting calendars, and pest pressure for nagoonberry, the canonical source is UConn Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Nagoonberry native to Connecticut?
Nagoonberry is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Connecticut. It can still earn a place in a Connecticut garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The Connecticut growing guide lists plants that USDA PLANTS records growing in Connecticut and that Kew and NatureServe Explorer both list in its native range, leaving out any that NatureServe flags as exotic there or that our audit holds.
State records: USDA PLANTS Database state-distribution data (presence, not state-level nativity), accessed 2026-10-19.
Common Questions About Growing Nagoonberry in Connecticut
When can I plant Nagoonberry in Connecticut?
Connecticut's last spring hard freeze (28°F) clears between Mar 31 and Apr 11, and the first fall hard freeze lands between Oct 30 and Nov 3 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Nagoonberry, so this page does not state whether it overwinters in Connecticut 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 Nagoonberry grown in across Connecticut?
Connecticut spans USDA hardiness zones 6a-7b (USDA ARS PHZM 2023). Nagoonberry is listed for zones 1-5, which do not overlap them, so there is no zone in Connecticut where this page can call outdoor growing reliable. A parcel report resolves your own address's zone.
How many frost-free days does a typical Connecticut site have?
A typical Connecticut site sees ~207 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Nagoonberry needs 120+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Nagoonberry native to Connecticut?
Nagoonberry is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Connecticut. It can still earn a place in a Connecticut garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Nagoonberry in Connecticut?
Nagoonberry tolerates pH 4.5-7.8 and well (dry spells) drainage. We haven't confirmed this against a published source yet. That is a 3.3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Connecticut site — amend for drainage and organic matter first.
Will Nagoonberry actually grow on my specific land in Connecticut?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores nagoonberry 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 Connecticut
State-level data is a sketch. Your Growable Ground report scores nagoonberry against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Connecticut nagoonberry averages can't show:
We read public map data around Connecticut — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Connecticut nagoonberry average
Explore More
Growing guides for nagoonberry
Explore Connecticut county by county
Connecticut carries 9 counties with their own USDA zone — a sample of the growing pages for nagoonberry there:
Where else nagoonberry grows
Nagoonberry's zone band crosses state lines — these are the states closest to Connecticut 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 Connecticut
Connecticut has a growing page for 887 plants — a rotating sample of the rest of the shelf.
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