When to plant lettuce in Hamburg
Lettuce is cold-hardy, so every date keys off Hamburg's frost dates of Apr 22.
Step 1 · Sow
Start seeds indoors
Mar 25 – Apr 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 1 – Apr 22
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 16 – May 31
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Hamburg's 181-day season leaves this much room.
Lettuce 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 22
OCT 20
Common questions
When can I sow lettuce outdoors in Hamburg?
Direct-sow around late March (Mar 25–Apr 15) in Hamburg, based on its local frost dates. Confidence 84%.
When will lettuce be ready to harvest in Hamburg?
Expect to harvest from around mid May (May 16–May 31) in Hamburg, based on its local frost dates. Confidence 76%.
When should I start lettuce seeds indoors in Hamburg?
Start seeds indoors around late March (Mar 25–Apr 15) in Hamburg, based on its local frost dates. Confidence 80%.
When can I transplant lettuce outdoors in Hamburg?
Transplant outdoors around early April (Apr 1–Apr 22) in Hamburg, based on its local frost dates. Confidence 84%.
How long is the growing season in Hamburg?
Hamburg has roughly 181 frost-free days, which is enough time to grow lettuce to maturity outdoors.
The rule of thumb
Sow lettuce 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 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.