North Carolina planting calendar

When to plant rosemary in North Carolina — sow, transplant & harvest dates

North Carolina is mostly USDA zone 7b (range 5b-8b). Dates below are derived from rosemary's frost tolerance and North Carolina's frost window — not generic national averages.

Rosemary planting timetable for North Carolina

Stage	When in North Carolina	Anchor
Start seeds indoors	late January (January 25)	10 weeks before the last frost (early April)
Transplant outside	mid-April (April 19)	14 days after the last frost (early April)
First harvest (estimate)	mid-July (July 18)	~90 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 North Carolina's climate shifts the rosemary dates

North Carolina's last spring frost averages early April and first fall frost late October, which sets the whole planting clock. North Carolina runs from cool mountains through the Piedmont to a warm coastal plain — one of the widest east-coast zone spans. Wait for warm soil — rosemary stall in cold ground even after the air warms, so don't rush them out.

Start seeds indoors 10–12 weeks before the last frost; germination is slow and erratic (14–21 days at 18–21 °C / 65–70 °F) with low viability, so propagation by stem cuttings is preferred by most Extension services. Transplant outdoors after the last frost once soil has warmed — rosemary is perennial only in USDA zones 7–10 (established plants survive to about −12 °C / 10 °F); in zones 6 and colder treat as a tender annual or overwinter potted plants indoors before the first autumn frost. Tip harvests of stem ends begin around 80–100 days from transplant.

Frost-risk note

Don't plant before early April — a hard freeze can still set young plants back. In the high Blue Ridge near Mount Mitchell (zone 5b) the safe date runs a week or two later.

Regional variation within North Carolina

the high Blue Ridge near Mount Mitchell (zone 5b) runs roughly 1-2 weeks behind the state average; the southern coast around Wilmington (zone 8b) can plant 1-2 weeks earlier.

Charlotte — USDA zone 8a
Raleigh — USDA zone 8a
Greensboro — USDA zone 7b
Asheville — USDA zone 7a
Wilmington — USDA zone 8b

What else to plant in North Carolina around then

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Quick-grow guide

Sun: Full sun — 6+ hours direct.
Soil temperature for germination: 18–21 °C (65–70 °F).
Spacing: 18–36 inches (45–90 cm) between plants.
Days to harvest: ~90 days from planting out.

Frequently asked questions

When is the best time to plant rosemary in North Carolina?

In North Carolina (mostly USDA zone 7b), sow rosemary indoors around late January, transplant outdoors mid-April (after the last frost, early April), and harvest from mid-July. Rosemary are half-hardy — young plants shrug off a light frost but not a hard freeze, so sowing can start a couple of weeks before the last spring frost.

What USDA zone is North Carolina?

Most of North Carolina sits in USDA hardiness zone 7b, with the state spanning roughly 5b-8b from the high Blue Ridge near Mount Mitchell (zone 5b) to the southern coast around Wilmington (zone 8b). The last spring frost averages early April and the first fall frost late October.

Can you grow rosemary in North Carolina?

Yes. North Carolina's dominant zone 7b supports rosemary — the key is timing. Rosemary are half-hardy — young plants shrug off a light frost but not a hard freeze, so sowing can start a couple of weeks before the last spring frost.

Does the planting date change across North Carolina?

the high Blue Ridge near Mount Mitchell (zone 5b) runs roughly 1-2 weeks behind the state average; the southern coast around Wilmington (zone 8b) can plant 1-2 weeks earlier.

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

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

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.