When to plant in Hanahan, SC
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Hanahan, South Carolina — is derived from the closest NOAA station with complete climate normals.
With about 265 frost-free days, Hanahan supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 9a is warm enough that Hanahan can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
CHARLESTON 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 Hanahan’s own odds, recorded at CHARLESTON INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 6 | Mar 21 | Feb 28 | Nov 1 | Nov 13 | Dec 1 |
| 32°F | Mar 27 | Mar 7 | Feb 12 | Nov 8 | Nov 27 | Dec 21 |
| 28°F | Mar 14 | Feb 20 | Jan 21 | Nov 21 | Dec 15 | Jan 13 |
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 Hanahan, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Hanahan planting FAQ
When is the last spring frost in Hanahan, SC?
Hanahan's average last spring frost falls near March 7 — 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 Hanahan, SC?
The first fall frost in Hanahan typically arrives around November 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Hanahan in?
Hanahan is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Hanahan?
There are roughly 265 frost-free days in Hanahan (a long growing season), running from the average last frost around March 7 to the first fall frost near November 27.
When should I plant tomatoes in Hanahan?
In Hanahan, start tomato seeds indoors around January 10–January 24, then transplant seedlings outdoors around March 14 once the danger of frost has passed.
Never miss a window in Hanahan
An email when it’s time to start seeds, transplant, and sow — timed to Hanahan’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- North Charleston · 6 km
- Goose Creek · 7 km
- Charleston · 12 km
- Ladson · 13 km
- Summerville · 19 km
- Mount Pleasant · 19 km
- James Island · 22 km
- Moncks Corner · 30 km
Frost dates recorded at CHARLESTON INTL AP, 5 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 Hanahan, SC — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013880. Retrieved from https://blissgarden.com/south-carolina/hanahan.