When to plant basil in Manchester
Basil is frost-tender, so every date keys off Manchester's last spring frost of Apr 25.
Step 1 · Sow
Start seeds indoors
Mar 21 – Apr 11
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 2 – May 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 1 – Jul 31
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 90 d
Manchester's 183-day season leaves this much room.
Basil 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 can I sow basil outdoors in Manchester?
Direct-sow around early May (May 2–May 23) in Manchester, based on its local frost dates. Confidence 84%.
When will basil be ready to harvest in Manchester?
Expect to harvest from around early July (Jul 1–Jul 31) in Manchester, based on its local frost dates. Confidence 76%.
When should I start basil seeds indoors in Manchester?
Start seeds indoors around late March (Mar 21–Apr 11) in Manchester, based on its local frost dates. Confidence 80%.
When can I transplant basil outdoors in Manchester?
Transplant outdoors around early May (May 2–May 23) 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 basil to maturity outdoors.
The rule of thumb
Sow basil 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. 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.