Radishes planting calendar for USDA Zone 8b

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

Radishes is well suited to Zone 8b. Standard planting dates work with minor adjustments for microclimates.

Key dates

Direct-seed outdoors

February 8 – March 1

Expected first harvest

March 15 – April 12

Fall planting window

September 27 – October 18

Fall harvest window

November 1 – November 29

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: 1″
Row spacing: 12″
Seed depth: 0.5″
Soil temperature: 45–70°F
Frost tolerance: hardy
Days to harvest: 28 days

Grower notes for Zone 8b

Fastest crop in the garden. Interplant with slow germinators like carrots to mark rows.

Plant near: cucumbers, carrots, lettuce

Keep away from: hyssop

Other root crops for Zone 8b

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.

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