When to plant basil in USDA Zone 9a

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.

Gainesville FL, Houston, New Orleans, southern GA coast. Average last spring frost February 25, first fall frost December 1 — a 279-day frost-free season.

Zone fit: excellent
Basil is well suited to Zone 9a. Standard planting dates work with minor adjustments for microclimates.

Key dates

Start seeds indoors
January 7 – January 21
Transplant outdoors
March 4 – March 25
Expected first harvest
May 5 – June 2
Fall planting window
September 15 – October 6
Fall harvest window
November 16 – December 14

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 9a

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.