When to plant leek in Manchester
Leek is cold-hardy, so every date keys off Manchester's frost dates of Apr 25.
Step 1 · Sow
Start seeds indoors
Feb 14 – Mar 7
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 11 – May 2
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 20 – Aug 9
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Manchester's 183-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 25
OCT 25
Common questions
When will leek be ready to harvest in Manchester?
Expect to harvest from around mid July (Jul 20–Aug 9) in Manchester, based on its local frost dates. Confidence 76%.
When should I start leek seeds indoors in Manchester?
Start seeds indoors around mid February (Feb 14–Mar 7) in Manchester, based on its local frost dates. Confidence 80%.
When can I transplant leek outdoors in Manchester?
Transplant outdoors around mid April (Apr 11–May 2) in Manchester, based on its local frost dates. Confidence 84%.
How long is the growing season in Manchester?
Manchester has roughly 183 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 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.