When to plant kale in Frankfurt

Kale is cold-hardy, so every date keys off Frankfurt's frost dates of Mar 30.
Step 1 · Sow
Start seeds indoors
Feb 16 – Mar 9
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 9 – Mar 30
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 3 – May 23
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 11 – Aug 25
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 12 – Nov 1
Maturity window for the second sowing.
Window
Days to maturity
55 – 75 d
Frankfurt's 230-day season leaves this much room.
Kale on Frankfurt'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
MAR 30
NOV 15

Common questions

When can I sow kale outdoors in Frankfurt?

Direct-sow around early March (Mar 9–Mar 30) in Frankfurt, based on its local frost dates. Confidence 89%.

When will kale be ready to harvest in Frankfurt?

Expect to harvest from around early May (May 3–May 23) in Frankfurt, based on its local frost dates. Confidence 80%.

When should I start kale seeds indoors in Frankfurt?

Start seeds indoors around mid February (Feb 16–Mar 9) in Frankfurt, based on its local frost dates. Confidence 85%.

When can I transplant kale outdoors in Frankfurt?

Transplant outdoors around early March (Mar 9–Mar 30) in Frankfurt, based on its local frost dates. Confidence 89%.

Can I plant kale in autumn in Frankfurt?

Yes — Frankfurt supports a second, autumn sowing of kale around mid August (Aug 11–Aug 25), timed to mature before the first fall frost.

How long is the growing season in Frankfurt?

Frankfurt has roughly 230 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 Frankfurt's frost dates.

Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.