When to plant leek in Manchester
Leek is cold-hardy, so every date keys off Manchester'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 21 – May 12
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 30 – Aug 19
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Manchester's 185-day season leaves this much room.
Leek on Manchester'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 21
Common questions
When will leek be ready to harvest in Manchester?
Expect to harvest from around late July (Jul 30–Aug 19) in Manchester, based on its local frost dates. Confidence 73%.
When should I start leek seeds indoors in Manchester?
Start seeds indoors around mid February (Feb 13–Mar 6) in Manchester, based on its local frost dates. Confidence 77%.
When can I transplant leek outdoors in Manchester?
Transplant outdoors around late April (Apr 21–May 12) in Manchester, based on its local frost dates. Confidence 79%.
How long is the growing season in Manchester?
Manchester has roughly 185 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 Manchester's frost dates.
Confidence 81/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.