When to plant leek in Burlington
Leek is cold-hardy, so every date keys off Burlington's frost dates of May 3.
Step 1 · Sow
Start seeds indoors
Feb 22 – Mar 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 23 – May 14
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 1 – Aug 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Burlington's 160-day season leaves this much room.
Leek on Burlington'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
MAY 3
OCT 9
Common questions
When will leek be ready to harvest in Burlington?
Expect to harvest from around early August (Aug 1–Aug 21) in Burlington, based on its local frost dates. Confidence 80%.
When should I start leek seeds indoors in Burlington?
Start seeds indoors around late February (Feb 22–Mar 15) in Burlington, based on its local frost dates. Confidence 85%.
When can I transplant leek outdoors in Burlington?
Transplant outdoors around late April (Apr 23–May 14) in Burlington, based on its local frost dates. Confidence 86%.
How long is the growing season in Burlington?
Burlington has roughly 160 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 Burlington's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.