When to plant basil in USDA Zone 8b

Plan your basil planting around local frost risk and soil temperature, then work backward from the harvest week your buyers need. The calendar below is a starting point, not a field-level weather forecast.

Charleston SC, Savannah, Mobile, Austin, Jacksonville. Average last spring frost March 15, first fall frost November 15 — a 245-day frost-free season.

Zone fit: excellent
Basil is well suited to Zone 8b. Standard planting dates work with minor adjustments for microclimates.

Key dates

Start seeds indoors
January 25 – February 8
Transplant outdoors
March 22 – April 12
Expected first harvest
May 23 – June 20
Fall planting window
August 30 – September 20
Fall harvest window
October 31 – November 28

Windows are calculated from your zone's average frost dates. Adjust ±1 week for microclimates, elevation, and your own frost records.

Spacing and soil

Plant spacing
12″
Row spacing
18″
Seed depth
0.125″
Soil temperature
70–90°F
Frost tolerance
tender
Days to harvest
55 days

Grower notes for Zone 8b

Pinch flowers weekly to keep leaves productive. Fusarium-resistant varieties are essential for repeat plantings in the same beds.

Plant near: tomatoes, peppers

Keep away from: rue

Same crop, other zones

Track your own plantings

BAU Farm Intelligence turns these windows into per-field tasks — indoor seed-start reminders, transplant dates, harvest projections — using your farm's actual frost history.