FrostCal

When to Plant Swiss Chard in Oklahoma

In a typical Oklahoma location, sow outdoors Mar 12 – Mar 26. Across the state, the outdoor planting window starts as early as Feb 22 in Ardmore and as late as Mar 28 in Guymon.

Method Direct sow
Days to maturity 50–60 days

Fairly cold-hardy; direct sow 1-3 weeks before last frost. Tolerates light frost in fall too.

Swiss Chard Planting Dates by City

CityDirect sow
Oklahoma CityMar 14 – Mar 28
TulsaMar 10 – Mar 24
NormanMar 10 – Mar 24
Broken ArrowMar 11 – Mar 25
LawtonMar 11 – Mar 25
EdmondMar 12 – Mar 26
MooreMar 14 – Mar 28
Midwest CityMar 12 – Mar 26
EnidMar 16 – Mar 30
StillwaterMar 15 – Mar 29
MuskogeeMar 17 – Mar 31
BartlesvilleMar 21 – Apr 4
OwassoMar 10 – Mar 24
ShawneeMar 9 – Mar 23
YukonMar 12 – Mar 26
ArdmoreFeb 22 – Mar 8
Ponca CityMar 20 – Apr 3
BixbyMar 11 – Mar 25
DuncanMar 4 – Mar 18
Del CityMar 12 – Mar 26
JenksMar 9 – Mar 23
SapulpaMar 9 – Mar 23
MustangMar 14 – Mar 28
Sand SpringsMar 9 – Mar 23
BethanyMar 12 – Mar 26
AltusMar 15 – Mar 29
ClaremoreMar 17 – Mar 31
El RenoMar 16 – Mar 30
McAlesterMar 10 – Mar 24
AdaMar 12 – Mar 26

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 Swiss chard in Oklahoma?

In a typical Oklahoma location, sow outdoors Mar 12 – Mar 26. Across the state, the outdoor planting window starts as early as Feb 22 in Ardmore and as late as Mar 28 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 Swiss chard take to grow?

Swiss Chard typically take 50–60 days from planting to harvest. Fairly cold-hardy; direct sow 1-3 weeks before last frost. Tolerates light frost in fall too.

Other Crops in Oklahoma

When to plant Swiss chard in other states

Related Guides