South Carolina planting calendar

When to plant broccoli in South Carolina — sow, transplant & harvest dates

South Carolina is mostly USDA zone 8a (range 7a-9a). Dates below are derived from broccoli's frost tolerance and South Carolina's frost window — not generic national averages.

Broccoli planting timetable for South Carolina

Stage	When in South Carolina	Anchor
Start seeds indoors	mid-February (February 11)	6 weeks before the last frost (late March)
Transplant outside	mid-March (March 11)	14 days before the last frost (late March)
First harvest (estimate)	late May (May 30)	~80 days from transplant

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why South Carolina's climate shifts the broccoli dates

South Carolina's last spring frost averages late March and first fall frost early November, which sets the whole planting clock. South Carolina has a long, hot, humid season with mild winters. The coast is nearly frost-free; the upstate sees a brief cold spell. Sow early — broccoli bolt once daytime temperatures hold above 24 °C, so the earlier they go in, the longer the harvest.

Start seeds indoors 6–8 weeks before last frost; transplant outdoors 2–4 weeks before last spring frost when soil reaches at least 7 °C (45 °F). Mature plants withstand temperatures as low as −6 °C (21 °F). Heads button (form premature small curds) when exposed to temperatures below 10 °C (50 °F) for extended periods as young seedlings, so harden off carefully. In zones 8–10, a second crop is practical as a fall planting, set out in late summer for harvest before hard freezes.

Frost-risk note

Don't plant before late March — a hard freeze can still set young plants back. In the Blue Ridge upstate near the mountains (zone 7a) the safe date runs a week or two later.

Regional variation within South Carolina

the Blue Ridge upstate near the mountains (zone 7a) runs roughly 1-2 weeks behind the state average; the Lowcountry coast around Charleston (zone 9a) can plant 1-2 weeks earlier.

Columbia — USDA zone 8b
Charleston — USDA zone 9a
Greenville — USDA zone 8a
Myrtle Beach — USDA zone 8b

What else to plant in South Carolina around then

The same early window suits peas, lettuce, spinach, and onion sets.

Quick-grow guide

Sun: Full sun — 6+ hours direct.
Soil temperature for germination: 7–29 °C (45–85 °F).
Spacing: 18–24 inches (45–60 cm) between plants.
Days to harvest: ~80 days from planting out.

Frequently asked questions

When is the best time to plant broccoli in South Carolina?

In South Carolina (mostly USDA zone 8a), sow broccoli indoors around mid-February, transplant outdoors mid-March (before the last frost, late March), and harvest from late May. Broccoli are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

What USDA zone is South Carolina?

Most of South Carolina sits in USDA hardiness zone 8a, with the state spanning roughly 7a-9a from the Blue Ridge upstate near the mountains (zone 7a) to the Lowcountry coast around Charleston (zone 9a). The last spring frost averages late March and the first fall frost early November.

Can you grow broccoli in South Carolina?

Yes. South Carolina's dominant zone 8a supports broccoli — the key is timing. Broccoli are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

Does the planting date change across South Carolina?

the Blue Ridge upstate near the mountains (zone 7a) runs roughly 1-2 weeks behind the state average; the Lowcountry coast around Charleston (zone 9a) can plant 1-2 weeks earlier.

What else can I plant in South Carolina around the same time?

The same early window suits peas, lettuce, spinach, and onion sets.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.