Not Verified — Winters This Mild
Not verified for winters this mild: balsam fir is listed for zones 3-6 — a growing recommendation, not a heat limit — and we hold no heat rating for it. Delaware runs zones 7a-8a, milder than that range, so this page gives no verdict here. The frost window and season figures below are measured for Delaware.
Balsam Fir in Delaware — the short answer
Balsam Fir in Delaware: listed for zones 3–6, part sun.
- Plant zones
- 3-6
- Rated hardy to zone 3a by NC State Extension Gardener Plant Toolbox; USDA PLANTS Database lists -43 °F, converted to zone 3a, checked Oct 2026. Ceiling: not verified.
- Delaware zones
- 7a-8a
- USDA PHZM 2023
- Frost window
- Mar 23 - Mar 23 – Nov 17 - Nov 19
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 238 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.
Delaware spans zones 7a-8a, 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 balsam fir against your parcel's actual hardiness, soil, and sun.
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Where Balsam Fir Stands in Delaware
Balsam Fir is rated for zones 3–6 — a cold floor USDA puts at -40 to -30°F. No Delaware 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 Delaware winters, not about balsam fir.
Above the zone 6 ceiling
3 counties
- Kent County · zone 7b
- New Castle County · zone 7b
- Sussex County · zone 7b
Warmer than the zone 6 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
Balsam Fir Needs
- USDA Zones: 3-6
- Sun: Part Sun
- Mature size: 60 ft tall
- Drought tolerance: Low
Delaware Has
- USDA Zones: 7a-8a
- Last Hard Freeze (28°F): Mar 23 - Mar 23
- First Hard Freeze (28°F): Nov 17 - Nov 19
- Annual Rainfall: 42-48 inches
- Common Soils: Sandy loam, Silt loam, Tidal marsh
Plant Zone Range (zones 3-6)
Preferred Soil pH
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 Balsam Fir in Delaware
The frost window
Across Delaware, the last spring hard freeze (28°F) clears between Mar 23 and Mar 23, and the first fall hard freeze lands between Nov 17 and Nov 19 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 239-day window you can count on — up to 241 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
Delaware runs as cold as USDA zone 7, and no sourced winter-hardiness floor is on record for balsam fir, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether balsam fir is a permanent planting or a replant-every-spring crop for you turns on your own zone within Delaware; 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.
Growing Season Fit
Chill hours
Balsam Fir requires ~1000 chill hours (32-45°F dormancy window). Delaware typically banks ~2500 chill hours per winter (from PRISM 1991-2020 climate normals), which keeps this plant on track.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Balsam Fir tolerates a wide pH range (pH 4.5-7.5) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Delaware. 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 and 6.5 — worth knowing before you decide whether a Delaware soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Delaware site is heavier clay or sits in a low spot, a raised bed lifts the roots above wet ground, or work in compost.
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. Delaware soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Balsam Fir in Delaware
Zone compatibility tells you about winter cold survival — but Delaware growers also need to think about:
Sandy soils in southern DE drain too quickly
Salt spray damage near the coast
Rising water tables in low-lying areas
What to actually do about these — and the constraints that apply to every Delaware grower, not just balsam fir — is covered on the Delaware growing guide.
Where in Delaware Balsam Fir's Listed Zones Fall
Balsam Fir is rated for USDA zones 3–6. Every Delaware county sits above it. Even Kent County, the state’s coldest at zone 7b, is milder than the plant’s zone 6 ceiling — the constraint here is winter chill it will not get, not cold it cannot take.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. Balsam Fir’s zone 3–6 band: Rated hardy to zone 3a by NC State Extension Gardener Plant Toolbox; USDA PLANTS Database lists -43 °F, converted to zone 3a, checked Oct 2026. Ceiling: not verified.. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Delaware Cooperative Extension
For Delaware-specific cultivar recommendations, planting calendars, and pest pressure for balsam fir, the canonical source is University of Delaware Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Balsam Fir native to Delaware?
Balsam Fir is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Delaware. It can still earn a place in a Delaware garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The Delaware growing guide lists plants that USDA PLANTS records growing in Delaware 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 Balsam Fir in Delaware
When can I plant Balsam Fir in Delaware?
Delaware's last spring hard freeze (28°F) clears between Mar 23 and Mar 23, and the first fall hard freeze lands between Nov 17 and Nov 19 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Balsam Fir, so this page does not state whether it overwinters in Delaware 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 Balsam Fir grown in across Delaware?
Delaware spans USDA hardiness zones 7a-8a (USDA ARS PHZM 2023). Balsam Fir is listed for zones 3-6, which do not overlap them, so there is no zone in Delaware 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 Delaware site have?
A typical Delaware site sees ~241 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Balsam Fir needs 100+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Balsam Fir native to Delaware?
Balsam Fir is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Delaware. It can still earn a place in a Delaware garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Balsam Fir in Delaware?
Balsam Fir tolerates pH 4.5-7.5 and well (dry spells) drainage (FAO ECOCROP). That is a 3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Delaware site — amend for drainage and organic matter first.
Will Balsam Fir actually grow on my specific land in Delaware?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores balsam fir 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 Delaware
State-level data is a sketch. Your Growable Ground report scores balsam fir against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Delaware balsam fir averages can't show:
We read public map data around Delaware — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Delaware balsam fir average
Explore More
Growing guides for balsam fir
Explore Delaware county by county
Delaware carries 3 counties with their own USDA zone — a sample of the growing pages for balsam fir there:
Where else balsam fir grows
Balsam Fir's zone band crosses state lines — these are the states closest to Delaware 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 Delaware
Delaware has a growing page for 1,005 plants — a rotating sample of the rest of the shelf.
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