When to plant cauliflower in Hamburg
Cauliflower is cold-hardy, so every date keys off Hamburg's frost dates of Apr 25.
Step 1 · Sow
Start seeds indoors
Mar 14 – Apr 4
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 11 – May 2
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 10 – Jul 5
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 23 – Jul 7
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 29 – Sep 23
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Hamburg's 185-day season leaves this much room.
Cauliflower on Hamburg'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 25
OCT 26
Common questions
When will cauliflower be ready to harvest in Hamburg?
Expect to harvest from around early June (Jun 10–Jul 5) in Hamburg, based on its local frost dates. Confidence 80%.
When should I start cauliflower seeds indoors in Hamburg?
Start seeds indoors around mid March (Mar 14–Apr 4) in Hamburg, based on its local frost dates. Confidence 85%.
When can I transplant cauliflower outdoors in Hamburg?
Transplant outdoors around mid April (Apr 11–May 2) in Hamburg, based on its local frost dates. Confidence 89%.
Can I plant cauliflower in autumn in Hamburg?
Yes — Hamburg supports a second, autumn sowing of cauliflower around late June (Jun 23–Jul 7), timed to mature before the first fall frost.
How long is the growing season in Hamburg?
Hamburg has roughly 185 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 Hamburg's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.