When to plant garlic in Birmingham
Garlic is cold-hardy, so every date keys off Birmingham's frost dates of Apr 24.
Step 1 · Sow
Direct sow outdoors
Sep 24 – Oct 15
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 21 – May 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
Birmingham's 181-day season leaves this much room.
Garlic 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 garlic outdoors in Birmingham?
Direct-sow around late September (Sep 24–Oct 15) in Birmingham, based on its local frost dates. Confidence 84%.
When will garlic be ready to harvest in Birmingham?
Expect to harvest from around late May (May 21–May 21) in Birmingham, based on its local frost dates. Confidence 76%.
How long is the growing season in Birmingham?
Birmingham has roughly 181 frost-free days, which is marginal time to grow garlic to maturity outdoors.
The rule of thumb
Sow garlic 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 Birmingham's frost dates.
Confidence 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.