Yes — Strong Match
bald cypress (zones 4-11) covers every zone Delaware contains (7a-8a), so hardiness is not what limits it anywhere in the state.
Bald Cypress in Delaware — the short answer
Bald Cypress in Delaware: hardy in zones 4–11, full sun.
- Plant zones
- 4-11
- Rated hardy to zone 4a by NC State Extension Gardener Plant Toolbox, 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 bald cypress against your parcel's actual hardiness, soil, and sun.
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Where in Delaware Fits Best
Even within Delaware's zones 7a-8a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for bald cypress (USDA PHZM 2023):
Zone Comparison
Bald Cypress Needs
- USDA Zones: 4-11
- Sun: Full Sun
- Mature size: 130 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 4-11)
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 Bald Cypress 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 bald cypress, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether bald cypress 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
The zone check says bald cypress survives winter here. Whether the season is long enough — and warm enough — is a different question.
Chill hours
Bald Cypress requires ~400 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
Bald Cypress tolerates a wide pH range (pH 4.5-8.5) — 4 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 5.5 and 7 — worth knowing before you decide whether a Delaware soil test result is a problem or just a number. Drainage matters: this plant wants poorly (saturated >50% of year), 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 Bald Cypress 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 bald cypress — is covered on the Delaware growing guide.
Where in Delaware Bald Cypress Is Zone-Hardy
Bald Cypress is rated for USDA zones 4–11. Every one of Delaware’s 3 counties sits inside that band — from Kent County at zone 7b to Sussex 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.
The planting window moves with it. Sussex County holds its last hard freeze (28°F) until about Mar 23, while Kent County is clear by Mar 22 — 1 days apart. Set bald cypress 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". Bald Cypress’s zone 4–11 band: Rated hardy to zone 4a by NC State Extension Gardener Plant Toolbox, 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 bald cypress, 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 Bald Cypress native to Delaware?
Yes — the USDA PLANTS Database (accessed 2026-10-19) records Bald Cypress in Delaware, Kew's Plants of the World Online (WCVP) lists Delaware in its native range, and NatureServe Explorer's state data mark it native there. Planting it supports the pollinators and wildlife that evolved alongside it.
State records: USDA PLANTS Database state-distribution data (presence, not state-level nativity), accessed 2026-10-19.
Native-range status: Kew, Plants of the World Online — World Checklist of Vascular Plants (WCVP), release 2026-06-04, licensed CC BY 3.0. State native/exotic flags: NatureServe Explorer, CC BY, accessed 2026-10-19. powo.science.kew.org explorer.natureserve.org
Common Questions About Growing Bald Cypress in Delaware
When can I plant Bald Cypress 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 Bald Cypress, 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 Bald Cypress grown in across Delaware?
Delaware spans USDA hardiness zones 7a-8a (USDA ARS PHZM 2023). Bald Cypress carries a range of zones 4-11, so the overlap zones are where outdoor growing is most reliable.
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). Bald Cypress needs 300+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Bald Cypress native to Delaware?
Yes — the USDA PLANTS Database (accessed 2026-10-19) records Bald Cypress in Delaware, Kew's Plants of the World Online (WCVP) lists Delaware in its native range, and NatureServe Explorer's state data mark it native there. Planting it supports the pollinators and wildlife that evolved alongside it.
How should I amend the soil for Bald Cypress in Delaware?
Bald Cypress tolerates pH 4.5-8.5 and poorly (saturated >50% of year), well (dry spells) drainage (FAO ECOCROP; USDA NRCS PLANTS Database). That is a 4-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 Bald Cypress actually grow on my specific land in Delaware?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores bald cypress 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 bald cypress against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Delaware bald cypress 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 bald cypress average
Explore More
Growing guides for bald cypress
Where else bald cypress grows
Bald Cypress'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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