When to plant leek in Columbus
Leek is cold-hardy, so every date keys off Columbus's frost dates of Apr 16.
Step 1 · Sow
Start seeds indoors
Feb 5 – Feb 26
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 2 – Apr 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 11 – Jul 31
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Columbus's 188-day season leaves this much room.
Leek on Columbus'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 16
OCT 25
Common questions
When will leek be ready to harvest in Columbus?
Expect to harvest from around mid July (Jul 11–Jul 31) in Columbus, based on its local frost dates. Confidence 80%.
When should I start leek seeds indoors in Columbus?
Start seeds indoors around early February (Feb 5–Feb 26) in Columbus, based on its local frost dates. Confidence 85%.
When can I transplant leek outdoors in Columbus?
Transplant outdoors around early April (Apr 2–Apr 23) in Columbus, based on its local frost dates. Confidence 89%.
How long is the growing season in Columbus?
Columbus has roughly 188 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 Columbus's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.