When to plant cauliflower in Bristol
Cauliflower is cold-hardy, so every date keys off Bristol's frost dates of Apr 18.
Step 1 · Sow
Start seeds indoors
Mar 7 – Mar 28
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 4 – Apr 25
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 3 – Jun 28
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Bristol's 197-day season leaves this much room.
Cauliflower on Bristol'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 18
NOV 1
Common questions
When will cauliflower be ready to harvest in Bristol?
Expect to harvest from around early June (Jun 3–Jun 28) in Bristol, based on its local frost dates. Confidence 74%.
When should I start cauliflower seeds indoors in Bristol?
Start seeds indoors around early March (Mar 7–Mar 28) in Bristol, based on its local frost dates. Confidence 78%.
When can I transplant cauliflower outdoors in Bristol?
Transplant outdoors around early April (Apr 4–Apr 25) in Bristol, based on its local frost dates. Confidence 82%.
How long is the growing season in Bristol?
Bristol has roughly 197 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 Bristol's frost dates.
Confidence 82/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.