When to plant leek in Frankfurt
Leek is cold-hardy, so every date keys off Frankfurt's frost dates of Apr 24.
Step 1 · Sow
Start seeds indoors
Feb 13 – Mar 6
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 10 – May 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 19 – Aug 8
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Frankfurt's 175-day season leaves this much room.
Leek 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
FROST
FROST
APR 24
OCT 16
Common questions
When will leek be ready to harvest in Frankfurt?
Expect to harvest from around mid July (Jul 19–Aug 8) in Frankfurt, based on its local frost dates. Confidence 65%.
When should I start leek seeds indoors in Frankfurt?
Start seeds indoors around mid February (Feb 13–Mar 6) in Frankfurt, based on its local frost dates. Confidence 68%.
When can I transplant leek outdoors in Frankfurt?
Transplant outdoors around early April (Apr 10–May 1) in Frankfurt, based on its local frost dates. Confidence 72%.
How long is the growing season in Frankfurt?
Frankfurt has roughly 175 frost-free days, which is enough time to grow leek to maturity outdoors.
The rule of thumb
Sow leek 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 72/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.