When to plant broccoli in Bristol
Broccoli is cold-hardy, so every date keys off Bristol's frost dates of Apr 12.
Step 1 · Sow
Start seeds indoors
Mar 1 – Mar 22
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 29 – Apr 19
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 28 – Jun 22
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 28 – Aug 11
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 3 – Oct 28
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Bristol's 204-day season leaves this much room.
Broccoli 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 12
NOV 11
Common questions
When will broccoli be ready to harvest in Bristol?
Expect to harvest from around late May (May 28–Jun 22) in Bristol, based on its local frost dates. Confidence 75%.
When should I start broccoli seeds indoors in Bristol?
Start seeds indoors around early March (Mar 1–Mar 22) in Bristol, based on its local frost dates. Confidence 79%.
When can I transplant broccoli outdoors in Bristol?
Transplant outdoors around late March (Mar 29–Apr 19) in Bristol, based on its local frost dates. Confidence 83%.
Can I plant broccoli in autumn in Bristol?
Yes — Bristol supports a second, autumn sowing of broccoli around late July (Jul 28–Aug 11), timed to mature before the first fall frost.
How long is the growing season in Bristol?
Bristol has roughly 204 frost-free days, which is enough time to grow broccoli to maturity outdoors.
The rule of thumb
Sow broccoli 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 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.