When should I plant watermelon in ZIP 32202?

In ZIP 32202, the main watermelon target is around Mar 15, based on the representative Jacksonville frost station and USDA zone 9a.

When should I start watermelon seeds indoors in 32202?

Start watermelon seeds indoors in ZIP 32202 around Feb 8, about 21 days before the Mar 1 last-frost estimate.

Is this a guaranteed planting date?

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

ZIP 32202 planting calendar

When to plant watermelon in Jacksonville, FL - Zone 9a

Q: When is the first frost in Jacksonville?

Jacksonville (ZIP 32202) has an average first fall frost around Dec 5, leaving about 279 frost-free days.

In ZIP 32202, plant watermelon around Mar 15; this uses the Jacksonville frost station, USDA zone 9a, and watermelon timing rules.

Your Jacksonville calendar has a 279-day estimated frost-free season. This estimate uses the representative Jacksonville frost station, USDA zone 9a, and watermelon timing rules.

Source: jacksonville-intl frost station, USDA zone 9a, 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 jacksonville-intl frost station and USDA zone 9a, last updated 2026-06-28.

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

USDA zone 9a Jacksonville frost station University of Florida IFAS Extension Updated 2026-06-28

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Answer first

When to start watermelon seeds indoors in Jacksonville

In ZIP 32202, start watermelon seeds indoors around Feb 8, about 21 days before the Mar 1 last-frost estimate.

Start watermelon seeds indoors in Jacksonville around Feb 8, about 21 days before the Mar 1 last-frost estimate.

Seed starting schedule

Watermelon dates for Jacksonville, FL

Step	Date	How to use it
Start Indoors	February 8, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	March 15, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	March 15, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Jacksonville?

Jacksonville (ZIP 32202) has an average last spring frost around Mar 1.

First frost

When is the first frost in Jacksonville?

The average first fall frost is around Dec 5, giving about 279 frost-free days.

Season map

Watermelon windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Start indoors

Feb 8

Direct sow

Mar 15

Transplant

Mar 15

Harvest

Jun 13

Frost watch

Sep 6

Reminder workflow

Every date has a next action

Start watermelon indoorsFeb 8

Last frost windowMar 1

Direct sow watermelonMar 15

Transplant watermelonMar 15

First watermelon harvest windowJun 13

Last watermelon sowing targetSep 6

Signal	Value	Why it matters
Last frost estimate	March 1, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	December 5, 2026	Fall planting counts backward from this date.
Season length	279 days	Longer seasons can support succession crops.
Spacing	36-60 in	Airflow and root space affect yield.
Soil temperature	70 F+	Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

Jacksonville frost history and USDA zone 9a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of Florida IFAS 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 Dec 5. A conservative last sowing target is around Sep 6.