When to plant kale in Oklahoma City

Kale is cold-hardy, so every date keys off Oklahoma City's frost dates of Apr 3.
Step 1 · Sow
Start seeds indoors
Feb 20 – Mar 13
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 25 – Jan 15
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 18 – Mar 10
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 1 – Aug 15
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 2 – Oct 22
Maturity window for the second sowing.
Window
Days to maturity
55 – 75 d
Oklahoma City's 223-day season leaves this much room.
Kale on Oklahoma City's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
APR 3
NOV 5

Common questions

When can I sow kale outdoors in Oklahoma City?

Direct-sow around late December (Dec 25–Jan 15) in Oklahoma City, based on its local frost dates. Confidence 85%.

When will kale be ready to harvest in Oklahoma City?

Expect to harvest from around mid February (Feb 18–Mar 10) in Oklahoma City, based on its local frost dates. Confidence 79%.

When should I start kale seeds indoors in Oklahoma City?

Start seeds indoors around mid February (Feb 20–Mar 13) in Oklahoma City, based on its local frost dates. Confidence 84%.

When can I transplant kale outdoors in Oklahoma City?

Transplant outdoors around late December (Dec 25–Jan 15) in Oklahoma City, based on its local frost dates. Confidence 85%.

Can I plant kale in autumn in Oklahoma City?

Yes — Oklahoma City supports a second, autumn sowing of kale around early August (Aug 1–Aug 15), timed to mature before the first fall frost.

How long is the growing season in Oklahoma City?

Oklahoma City has roughly 223 frost-free days, which is enough time to grow kale to maturity outdoors.

The rule of thumb

Sow kale as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and Oklahoma City's frost dates.

Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.