Conditional — Some Areas
canna lily (zones 7-11) has limited zone overlap with Connecticut (5b-7a). Only zones 7-7 in the state are suitable.
Your yard isn't the whole zone.
Connecticut spans zones 5b-7a, 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 canna lily against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Zone Comparison
Canna Lily Needs
- USDA Zones: 7-11
- Soil pH: 5 - 8
- Sun: Full Sun
- Drainage: well (dry spells)
- Frost-Free Days: 0+
Connecticut Has
- USDA Zones: 5b-7a
- Last Frost: Apr 15 - May 15
- First Frost: Sep 25 - Oct 25
- Annual Rainfall: 44-52 inches
- Common Soils: Glacial till, Sandy loam, River valley silt
Plant Zone Range (zones 7-11)
Preferred Soil pH
Plant data: USDA PLANTS Database / plant_species_v5.csv. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Canna Lily in Connecticut
The frost window
Across Connecticut, the last spring frost clears between Apr 15 and May 15, and the first fall frost lands between Sep 25 and Oct 25 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 133-day window you can count on — up to 193 days on a mild site in a kind year.
Frost tenderness
Canna Lily is frost-tender — its listed minimum temperature is 57.2°F (USDA PLANTS Database) — so set plants out after the last frost has cleared your local site, not the state's earliest date.
Timing tuned to sub-state frost dates — Northwest Hills County, not the statewide average.
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.
Growing Season Fit
Zone compatibility says you can survive winter here. Whether the growing season is long enough — and warm enough — is a different question.
Frost-free days
Canna Lily wants 0+ frost-free days; a typical Connecticut site sees ~170 (NOAA Climate Normals). That leaves comfortable headroom for succession planting.
Climate aggregates derive from USDA NRCS county-level hardiness data + Cornell CALS Extension GDD-by-region tables + MSU Extension chill-hours-by-zone (1991-2020 NOAA Climate Normals baseline).
Soil + Drainage Fit
Canna Lily likes near-neutral soil (pH 5-8). That's the common-ground band across Connecticut's glacial till and sandy loam — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Connecticut site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
Whether canna lily is safe to eat from Connecticut soil is a block-by-block question, not a town-wide one — 19,222 documented contamination sites mean levels spike on some parcels and not the one next door, so only a test on your address settles it.
Check your parcel → Source: USDA NRCS SSURGO + EPA/state contamination databases.
Plant pH and drainage requirements from USDA PLANTS Database. Connecticut soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Canna Lily in Connecticut — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 7-11 (USDA PLANTS Database)
- State Zones: 5b-7a (USDA ARS PHZM 2023)
- Growing Season: Apr 15 - May 15 to Sep 25 - Oct 25 (NOAA Climate Normals)
What Else to Consider
Zone compatibility tells you about winter cold survival — but Connecticut growers also need to think about:
Rocky glacial soils require clearing and amendment
Skip the boulder harvest: a raised bed over cleared ground starts clean, and the rocks you do pull make fine bed borders.
Short growing season in northern hills
In the hills, choose fast-maturing varieties and add a cold frame — the season is short but very workable with an assist.
Deer pressure is high in suburban areas
Fencing works; repellents — rotated so deer never habituate — help between the fence posts.
Growing canna lily here specifically
Because you eat the root of canna lily that sit in the soil, contamination matters more than for most crops — Connecticut has 19,222 documented sites, and lead concentrates block by block, not town-wide.
Test your soil for lead first, and raise canna lily in clean imported soil if the reading is high. How to handle it →
Timing shifts within Connecticut
Connecticut isn't one climate. In Northwest Hills County, the last hard freeze (28°F) holds until about Apr 12 — roughly 12 days later than the recorded state median — so plant canna lily to your county's window, not the statewide date.
County last-freeze dates: NOAA/PRISM Climate Normals 1991-2020, 28°F threshold (earlier than the folk 32°F "last frost"). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Canna Lily draws pollinators (moderate value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Recommended Canna Lily Varieties for Connecticut
Connecticut publishes no state variety trial for canna lily, so we won't invent a "best for Connecticut" list. Choose types rated to your USDA hardiness zone (5b-7a), and confirm winter survival and drainage against your own parcel.
Connecticut Cooperative Extension
For Connecticut-specific cultivar recommendations, planting calendars, and pest pressure for canna lily, the canonical source is UConn Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Canna Lily in Connecticut
When can I plant Canna Lily in Connecticut?
Connecticut's last spring frost clears between Apr 15 and May 15, and the first fall frost lands between Sep 25 and Oct 25 (NOAA Climate Normals 1991-2020). Canna Lily is frost-tender — its listed minimum temperature is 57.2°F (USDA PLANTS Database) — so wait until the last frost has cleared your specific site before planting out.
What hardiness zone is Canna Lily grown in across Connecticut?
Connecticut spans USDA hardiness zones 5b-7a (USDA ARS PHZM 2023). Canna Lily carries a range of zones 7-11, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Connecticut site have?
A typical Connecticut site sees ~170 frost-free days per year (derived from NOAA Climate Normals 1991-2020). Canna Lily needs 0+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Northwest Hills, the freeze-free season runs shorter than the state average, so verify your own county's window.
How should I amend the soil for Canna Lily in Connecticut?
Canna Lily prefers pH 5-8 and well (dry spells) drainage (USDA PLANTS Database). That sits in the common-ground band across Connecticut soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Canna Lily actually grow on my specific land in Connecticut?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores canna lily 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 Connecticut
State-level data is a sketch. Your Growable Ground report scores canna lily against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →