Yes — Strong Match
sweet alyssum is grown in zones 5-9, which covers every zone Georgia contains (7a-9b). Whether the season is long enough is the question that remains.
Sweet Alyssum in Georgia — the short answer
Sweet Alyssum in Georgia: grown in zones 5–9, full sun, against a state median of ~275 frost-free days.
- Plant zones
- 5-9
- NC State Extension Gardener Plant Toolbox
- Georgia zones
- 7a-9b
- USDA PHZM 2023
- Frost window
- Feb 17 - Mar 10 – Nov 24 - Dec 4
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 204 days
- NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze
- Days to maturity
- 55 days
- Growable Ground Plant Database
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.
Georgia spans zones 7a-9b, 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 sweet alyssum against your parcel's actual hardiness, soil, and sun.
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Georgia is not one climate
A single Georgia answer averages 159 counties whose growing seasons are 101 days apart — from 204 frost-free days in Towns County to 305 in Colquitt County. Which end of that your land sits nearer changes what sweet alyssum can finish before the first hard freeze.
The middle half of 159 counties runs 259–290 days, with a median of 275 days — a 101-day span end to end.
Measured across 159 Georgia counties. NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze. 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 Georgia Fits Best
Even within Georgia's zones 7a-9b, county microclimates differ enough to change what thrives. These counties carry the closest zone match for sweet alyssum (USDA PHZM 2023):
Zone Comparison
Sweet Alyssum Needs
- USDA Zones: 5-9
- Frost-Free Days: 40+
- Sun: Full Sun
- Mature size: 6 in tallWe haven't confirmed this against a published source yet.
- Picking window: ~90 days of harvestWe haven't confirmed this against a published source yet.
- Drought tolerance: MediumWe haven't confirmed this against a published source yet.
Georgia Has
- USDA Zones: 7a-9b
- Last Hard Freeze (28°F): Feb 17 - Mar 10
- First Hard Freeze (28°F): Nov 24 - Dec 4
- Annual Rainfall: 45-55 inches
- Common Soils: Red clay (Piedmont), Sandy loam (Coastal Plain), Alluvial
Plant Zone Range (zones 5-9)
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 Sweet Alyssum in Georgia
The frost window
Across Georgia, the last spring hard freeze (28°F) clears between Feb 17 and Mar 10, and the first fall hard freeze lands between Nov 24 and Dec 4 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 259-day window you can count on — up to 290 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.
When to start the seed
Those dates are when sweet alyssum goes out, not when it starts. It is sown under cover about 4 weeks ahead, so counting back from Georgia's late-side last freeze of Mar 10 is what fixes your sowing date — and a yard that clears frost earlier than the state's late date starts earlier still.
Winter standing
Georgia runs as cold as USDA zone 7, and no sourced winter-hardiness floor is on record for sweet alyssum, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether sweet alyssum is a permanent planting or a replant-every-spring crop for you turns on your own zone within Georgia; 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
Sweet Alyssum is grown in zones 5–9, which covers every zone Georgia contains (7a-9b). It is grown as a summer crop, so season length decides it here. Georgia's typical season runs ~275 frost-free days against the ~40 sweet alyssum needs.
Frost-free days
Sweet Alyssum wants 40+ frost-free days; a typical Georgia site sees ~275 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves comfortable headroom for succession planting.
Growing degree days
Sweet Alyssum needs ~600 GDD (base 50°F) to ripen. We haven't confirmed this against a published source yet. The state median runs ~5616 GDD (from PRISM 1991-2020 climate normals), so Georgia's typical season clears that easily.
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
Sweet Alyssum likes near-neutral soil (pH 6-7). That's the common-ground band across Georgia's red clay (piedmont) and sandy loam (coastal plain) — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Georgia 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 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. Georgia soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Sweet Alyssum in Georgia
The zone range tells you where sweet alyssum is grown — but Georgia growers also need to think about:
Heavy red Piedmont clay is difficult to work and drains poorly
High humidity drives fungal diseases in summer
Fire ants are a persistent pest in gardens across the state
Summer heat (90-100F) can stress cool-season crops by May
What to actually do about these — and the constraints that apply to every Georgia grower, not just sweet alyssum — is covered on the Georgia growing guide.
Timing shifts within Georgia
Sweet Alyssum needs about 40 days of frost-free season to complete its cycle. Even Towns County — Georgia’s shortest season at 204 frost-free days — clears that by 164 days, so season length isn’t the constraint anywhere in Georgia. What varies is your own parcel.
Across Georgia’s 159 counties the frost-free season runs from 204 days in Towns County to 305 days in Colquitt County — a spread of 101 days, which is why a single statewide planting date misleads. The median Georgia county sees 275 frost-free days, leaving sweet alyssum about 235 days of slack on a typical parcel — room for a second sowing where the season runs long.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Sweet Alyssum's 40-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Sweet Alyssum draws honeybees, native bees, and butterflies (high value). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, sweet alyssum can only work that bloom inside Georgia's frost window — roughly 275 days, opening after the last 28°F freeze (Feb 17 - Mar 10) and closing at the first (Nov 24 - Dec 4), per NOAA Regional Climate Centers ACIS, 1991-2020. Pollinator value: We haven't confirmed this against a published source yet.
Georgia Cooperative Extension
For Georgia-specific cultivar recommendations, planting calendars, and pest pressure for sweet alyssum, the canonical source is UGA Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Sweet Alyssum native to Georgia?
No — the USDA PLANTS Database lists Sweet Alyssum as introduced rather than native in the Lower 48, so it is not part of Georgia's native flora. It grows here as a garden plant; pairing it with a few Georgia natives keeps local pollinators fed too.
Looking for plants that belong here? The Georgia growing guide lists plants that USDA PLANTS records growing in Georgia 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 Sweet Alyssum in Georgia
When can I plant Sweet Alyssum in Georgia?
Georgia's last spring hard freeze (28°F) clears between Feb 17 and Mar 10, and the first fall hard freeze lands between Nov 24 and Dec 4 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Sweet Alyssum, so this page does not state whether it overwinters in Georgia 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 Sweet Alyssum grown in across Georgia?
Georgia spans USDA hardiness zones 7a-9b (USDA ARS PHZM 2023). Sweet Alyssum carries a range of zones 5-9, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Georgia site have?
A typical Georgia site sees ~275 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Sweet Alyssum needs 40+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Sweet Alyssum native to Georgia?
No — the USDA PLANTS Database lists Sweet Alyssum as introduced rather than native in the Lower 48, so it is not part of Georgia's native flora. It grows here as a garden plant; pairing it with a few Georgia natives keeps local pollinators fed too.
How should I amend the soil for Sweet Alyssum in Georgia?
Sweet Alyssum prefers pH 6-7 and well (dry spells) drainage. We haven't confirmed this against a published source yet. That sits in the common-ground band across Georgia soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Sweet Alyssum actually grow on my specific land in Georgia?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores sweet alyssum 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 Georgia
State-level data is a sketch. Your Growable Ground report scores sweet alyssum against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Georgia sweet alyssum averages can't show:
We read public map data around Georgia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Georgia sweet alyssum average
Explore More
Growing guides for sweet alyssum
Explore Georgia county by county
Georgia carries 159 counties with their own USDA zone — a sample of the growing pages for sweet alyssum there:
Where else sweet alyssum grows
Sweet Alyssum's zone band crosses state lines — these are the states closest to Georgia 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 Georgia
Georgia has a growing page for 1,029 plants — a rotating sample of the rest of the shelf.
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