When to plant in Union City, GA
USDA Zone 8aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Union City, Georgia — all computed from Union City's nearest NOAA weather station.
A generous ~250-day season lets Union City gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 8a, Union City supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average last spring frost in Union City is now 5 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ATLANTA HARTSFIELD INTL AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Union City’s own odds, recorded at ATLANTA HARTSFIELD INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 16 | Mar 29 | Mar 10 | Oct 28 | Nov 7 | Nov 25 |
| 32°F | Apr 4 | Mar 15 | Feb 23 | Nov 4 | Nov 20 | Dec 10 |
| 28°F | Mar 20 | Feb 28 | Feb 1 | Nov 14 | Dec 5 | Jan 3 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Union City, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Union City planting FAQ
When is the last spring frost in Union City, GA?
Union City's average last spring frost falls near March 15 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Union City, GA?
The first fall frost in Union City typically arrives around November 20 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Union City in?
Union City is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Union City?
Union City has about 250 frost-free days — a long growing season — between the average last spring frost (March 15) and first fall frost (November 20).
When should I plant tomatoes in Union City?
For Union City, sow tomatoes indoors about January 18–February 1 and move the seedlings out around March 22, after the last spring frost.
Never miss a window in Union City
An email when it’s time to start seeds, transplant, and sow — timed to Union City’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- South Fulton · 5 km
- Fairburn · 6 km
- College Park · 11 km
- East Point · 12 km
- Riverdale · 14 km
- Fayetteville · 18 km
- Forest Park · 19 km
- Douglasville · 20 km
Frost dates recorded at ATLANTA HARTSFIELD INTL AP, 12 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Union City, GA — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013874. Retrieved from https://blissgarden.com/georgia/union-city.