When to plant basil in Charlotte, North Carolina

April 13 – April 29

Transplant outdoors · typical Charlotte year

Climate basis: NOAA station Charlotte Douglas AP, NC (USW00013881), 6 mi (10 km) from downtown Charlotte (ZCTA 28202 centroid), elevation 728 ft, on the 1991–2020 climate normals. Transplant basil outdoors from approximately the dates above, anchored to the median last spring 32°F freeze (March 30). One year in ten still freezes after April 14.

Last spring freezeMarch 301-in-10 after Apr 14

First fall freezeNovember 31-in-10 before Oct 22

Frost-free season≈ 221 daysmedian at 32°F

Hard freeze, 28°Mar 17 – Nov 14kills even hardy greens

USDA zone8a10 to 15°F winter low — not frost timing

The Charlotte year

Start seeds indoorsFeb 23 – Mar 2

Transplant outdoorsApr 13 – Apr 29

Direct-sow outdoorsApr 29 – May 13

indoors under lights
in the garden
frost-free season
1-in-10 years still freeze to Apr 14

Basil in Charlotte · freeze context from Charlotte Douglas AP, NC, 1991–2020 normals.

Every method, with its sources

Start seeds indoors

Feb 23 – Mar 2

Iowa State: start seeds indoors 4 or 5 weeks before the last frost date. Anchored to the median last spring freeze (Mar 30). Iowa State University Extension and Outreach

Transplant outdoors

Apr 13 – Apr 29

UNH: set out 2 weeks after the last frost; Oklahoma State: plant one month after the last spring frost; Iowa State: after all danger of frost. The window spans the UNH and Oklahoma State recommendations. Anchored to the median last spring freeze (Mar 30). University of New Hampshire Extension · Oklahoma State University Extension · Iowa State University Extension and Outreach

Direct-sow outdoors

Apr 29 – May 13

Oklahoma State Table 1 times basil planting one month after the last spring frost; Iowa State adds direct sowing once nights stay above 50°F. Point rule given a 14-day span. Anchored to the median last spring freeze (Mar 30). Oklahoma State University Extension · Iowa State University Extension and Outreach

Variety assumption: Leaves are harvestable about 30–40 days after transplanting.

These windows describe typical years (1991–2020 climate normals), not this year's forecast. Freezes happen outside them — especially in frost pockets, valleys, and urban edges. Watch the forecast before committing tender plants.

This week, not a typical year:

Crop rule sources (3)

Iowa State University Extension and Outreach: Growing Basil in the Home Garden (accessed 2026-07-24)
"Start seeds indoors 4 or 5 weeks before the last frost date." "Plant basil outdoors after all danger of frost is past."
University of New Hampshire Extension: Growing Vegetables: When to Plant Your Vegetable Garden [fact sheet] (accessed 2026-07-24)
Per-crop 'time from seed to transplant' and 'safe to set out in garden' relative to last frost.
Oklahoma State University Extension: Culinary Herbs for Oklahoma Gardens: Culture, Use and Preservation (accessed 2026-07-24)
Table 1 planting times relative to last spring frost for common herbs.

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