When to plant cauliflower in Birmingham
Cauliflower is cold-hardy, so every date keys off Birmingham's frost dates of Apr 24.
Step 1 · Sow
Start seeds indoors
Mar 13 – Apr 3
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 10 – May 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 9 – Jul 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Birmingham's 181-day season leaves this much room.
Cauliflower 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 will cauliflower be ready to harvest in Birmingham?
Expect to harvest from around early June (Jun 9–Jul 4) in Birmingham, based on its local frost dates. Confidence 76%.
When should I start cauliflower seeds indoors in Birmingham?
Start seeds indoors around mid March (Mar 13–Apr 3) in Birmingham, based on its local frost dates. Confidence 80%.
When can I transplant cauliflower outdoors in Birmingham?
Transplant outdoors around early April (Apr 10–May 1) 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 cauliflower to maturity outdoors.
The rule of thumb
Sow cauliflower 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.