FrostCal

When to Plant Watermelon in Oklahoma

In a typical Oklahoma location, start seeds indoors Mar 5 – Mar 12, then transplant outdoors Apr 16 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 29 in Ardmore and as late as May 2 in Guymon.

Method Start indoors, then transplant
Days to maturity 70–90 days

Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost.

Watermelon Planting Dates by City

CityStart indoorsTransplant
Oklahoma CityMar 7 – Mar 14Apr 18 – Apr 25
TulsaMar 3 – Mar 10Apr 14 – Apr 21
NormanMar 3 – Mar 10Apr 14 – Apr 21
Broken ArrowMar 4 – Mar 11Apr 15 – Apr 22
LawtonMar 4 – Mar 11Apr 15 – Apr 22
EdmondMar 5 – Mar 12Apr 16 – Apr 23
MooreMar 7 – Mar 14Apr 18 – Apr 25
Midwest CityMar 5 – Mar 12Apr 16 – Apr 23
EnidMar 9 – Mar 16Apr 20 – Apr 27
StillwaterMar 8 – Mar 15Apr 19 – Apr 26
MuskogeeMar 10 – Mar 17Apr 21 – Apr 28
BartlesvilleMar 14 – Mar 21Apr 25 – May 2
OwassoMar 3 – Mar 10Apr 14 – Apr 21
ShawneeMar 2 – Mar 9Apr 13 – Apr 20
YukonMar 5 – Mar 12Apr 16 – Apr 23
ArdmoreFeb 15 – Feb 22Mar 29 – Apr 5
Ponca CityMar 13 – Mar 20Apr 24 – May 1
BixbyMar 4 – Mar 11Apr 15 – Apr 22
DuncanFeb 25 – Mar 4Apr 8 – Apr 15
Del CityMar 5 – Mar 12Apr 16 – Apr 23
JenksMar 2 – Mar 9Apr 13 – Apr 20
SapulpaMar 2 – Mar 9Apr 13 – Apr 20
MustangMar 7 – Mar 14Apr 18 – Apr 25
Sand SpringsMar 2 – Mar 9Apr 13 – Apr 20
BethanyMar 5 – Mar 12Apr 16 – Apr 23
AltusMar 8 – Mar 15Apr 19 – Apr 26
ClaremoreMar 10 – Mar 17Apr 21 – Apr 28
El RenoMar 9 – Mar 16Apr 20 – Apr 27
McAlesterMar 3 – Mar 10Apr 14 – Apr 21
AdaMar 5 – Mar 12Apr 16 – Apr 23

Showing the 30 most populous of 48 Oklahoma cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Oklahoma cities.

Frequently Asked Questions

When should I plant watermelon in Oklahoma?

In a typical Oklahoma location, start seeds indoors Mar 5 – Mar 12, then transplant outdoors Apr 16 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 29 in Ardmore and as late as May 2 in Guymon.

When is the last frost in Oklahoma?

The average last spring frost in Oklahoma ranges from March 15 in Ardmore to April 18 in Guymon, based on NOAA 1991–2020 climate normals.

How long do watermelon take to grow?

Watermelon typically take 70–90 days from planting to harvest. Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost.

Other Crops in Oklahoma

When to plant watermelon in other states

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