When to plant kale in Louisville

Kale is cold-hardy, so every date keys off Louisville's frost dates of Apr 1.
Step 1 · Sow
Start seeds indoors
Feb 18 – Mar 11
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 11 – Apr 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 5 – May 25
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 25 – Aug 8
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 25 – Oct 15
Maturity window for the second sowing.
Window
Days to maturity
55 – 75 d
Louisville's 212-day season leaves this much room.
Kale on Louisville'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 1
OCT 29

Common questions

When can I sow kale outdoors in Louisville?

Direct-sow around mid March (Mar 11–Apr 1) in Louisville, based on its local frost dates. Confidence 82%.

When will kale be ready to harvest in Louisville?

Expect to harvest from around early May (May 5–May 25) in Louisville, based on its local frost dates. Confidence 74%.

When should I start kale seeds indoors in Louisville?

Start seeds indoors around mid February (Feb 18–Mar 11) in Louisville, based on its local frost dates. Confidence 78%.

When can I transplant kale outdoors in Louisville?

Transplant outdoors around mid March (Mar 11–Apr 1) in Louisville, based on its local frost dates. Confidence 82%.

Can I plant kale in autumn in Louisville?

Yes — Louisville supports a second, autumn sowing of kale around late July (Jul 25–Aug 8), timed to mature before the first fall frost.

How long is the growing season in Louisville?

Louisville has roughly 212 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 Louisville's frost dates.

Confidence 82/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.