When to plant radish in Hamburg
Radish is cold-hardy, so every date keys off Hamburg's frost dates of Apr 25.
Step 1 · Sow
Direct sow outdoors
Mar 28 – Apr 18
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 22 – Apr 27
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Sep 5 – Sep 19
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 7 – Oct 12
Maturity window for the second sowing.
Window
Days to maturity
25 – 30 d
Hamburg's 185-day season leaves this much room.
Radish 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 can I sow radish outdoors in Hamburg?
Direct-sow around late March (Mar 28–Apr 18) in Hamburg, based on its local frost dates. Confidence 89%.
When will radish be ready to harvest in Hamburg?
Expect to harvest from around late April (Apr 22–Apr 27) in Hamburg, based on its local frost dates. Confidence 80%.
Can I plant radish in autumn in Hamburg?
Yes — Hamburg supports a second, autumn sowing of radish around early September (Sep 5–Sep 19), 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 radish to maturity outdoors.
The rule of thumb
Sow radish 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.