When to plant in Fort Mill, SC
USDA Zone 8aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Fort Mill, South Carolina — all computed from Fort Mill's nearest NOAA weather station.
In zone 8a, Fort Mill supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
ROCK HILL YORK CO 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 Fort Mill’s own odds, recorded at ROCK HILL YORK CO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 28 | Apr 13 | Mar 29 | Oct 14 | Oct 26 | Nov 7 |
| 32°F | Apr 15 | Mar 31 | Mar 13 | Oct 23 | Nov 4 | Nov 19 |
| 28°F | Apr 4 | Mar 18 | Feb 27 | Nov 1 | Nov 16 | Dec 4 |
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 Fort Mill, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Fort Mill planting FAQ
When is the last spring frost in Fort Mill, SC?
Plan for the last spring frost in Fort Mill around March 31 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Fort Mill, SC?
In Fort Mill, the first 32°F freeze of fall lands around November 4 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Fort Mill in?
Fort Mill is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Fort Mill?
Fort Mill has about 218 frost-free days — a long growing season — between the average last spring frost (March 31) and first fall frost (November 4).
When should I plant tomatoes in Fort Mill?
For Fort Mill, sow tomatoes indoors about February 3–February 17 and move the seedlings out around April 7, after the last spring frost.
Never miss a window in Fort Mill
An email when it’s time to start seeds, transplant, and sow — timed to Fort Mill’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Tega Cay · 7 km
- Rock Hill · 10 km
- Pineville · 11 km
- Lake Wylie · 16 km
- Weddington · 19 km
- Waxhaw · 20 km
- Matthews · 24 km
- Charlotte · 25 km
Frost dates recorded at ROCK HILL YORK CO AP, 11 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 Fort Mill, SC — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053871. Retrieved from https://blissgarden.com/south-carolina/fort-mill.