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ZIP 30301 planting calendar

When to plant watermelon in Atlanta, GA - Zone 8a

In ZIP 30301, plant watermelon around Apr 12; this uses the Atlanta frost station, USDA zone 8a, and watermelon timing rules.

Your Atlanta calendar has a 226-day estimated frost-free season. This estimate uses the representative Atlanta frost station, USDA zone 8a, and watermelon timing rules.

Source: atlanta-hartsfield frost station, USDA zone 8a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

Reviewed by GrowZone Editorial. Calculated from the atlanta-hartsfield frost station and USDA zone 8a, last updated 2026-06-28.

In the Atlanta area, watermelon timing follows the Atlanta frost window, so the local ZIP date can differ from a broad zone-only calendar.

USDA zone 8a Atlanta frost station University of Georgia Extension Updated 2026-06-28
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Answer first

When to start watermelon seeds indoors in Atlanta

In ZIP 30301, start watermelon seeds indoors around Mar 8, about 21 days before the Mar 29 last-frost estimate.

Start watermelon seeds indoors in Atlanta around Mar 8, about 21 days before the Mar 29 last-frost estimate.

Seed starting schedule

Watermelon dates for Atlanta, GA

StepDateHow to use it
Start IndoorsMarch 8, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsApril 12, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowApril 12, 2026Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Atlanta?

Atlanta (ZIP 30301) has an average last spring frost around Mar 29.

First frost

When is the first frost in Atlanta?

The average first fall frost is around Nov 10, giving about 226 frost-free days.

Season map

Watermelon windows by month

JanFebMarAprMayJunJulAugSepOctNovDec
Start indoors
Mar 8
Direct sow
Apr 12
Transplant
Apr 12
Harvest
Jul 11
Frost watch
Aug 12

Reminder workflow

Every date has a next action

Start watermelon indoorsMar 8
Last frost windowMar 29
Direct sow watermelonApr 12
Transplant watermelonApr 12
First watermelon harvest windowJul 11
Last watermelon sowing targetAug 12
SignalValueWhy it matters
Last frost estimateMarch 29, 2026Warm-season transplant risk starts falling after this window.
First frost estimateNovember 10, 2026Fall planting counts backward from this date.
Season length226 daysLonger seasons can support succession crops.
Spacing36-60 inAirflow and root space affect yield.
Soil temperature70 F+Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

Atlanta frost history and USDA zone 8a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of Georgia Extension is the kind of local source to verify against when a crop is expensive, weather is unusual, or your yard has a cold pocket.

Crop note

Watermelon timing notes

Wait for warm soil; watermelon stalls when nights stay cool. Watermelon prefers full sun, 36-60 in spacing, and soil near 70 F+.

For fall, count backward from Nov 10. A conservative last sowing target is around Aug 12.