When to plant basil in Birmingham
Basil is frost-tender, so every date keys off Birmingham's last spring frost of Apr 24.
Step 1 · Sow
Start seeds indoors
Mar 20 – Apr 10
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 1 – May 22
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 30 – Jul 30
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 90 d
Birmingham's 181-day season leaves this much room.
Basil on Birmingham'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 22
Common questions
When can I sow basil outdoors in Birmingham?
Direct-sow around early May (May 1–May 22) in Birmingham, based on its local frost dates. Confidence 84%.
When will basil be ready to harvest in Birmingham?
Expect to harvest from around late June (Jun 30–Jul 30) in Birmingham, based on its local frost dates. Confidence 76%.
When should I start basil seeds indoors in Birmingham?
Start seeds indoors around mid March (Mar 20–Apr 10) in Birmingham, based on its local frost dates. Confidence 80%.
When can I transplant basil outdoors in Birmingham?
Transplant outdoors around early May (May 1–May 22) in Birmingham, based on its local frost dates. Confidence 84%.
How long is the growing season in Birmingham?
Birmingham has roughly 181 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 Birmingham's frost dates.
Confidence 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.