When to plant summer squash / zucchini in Hamburg
Summer squash / Zucchini is frost-tender, so every date keys off Hamburg's last spring frost of Apr 22.
Step 1 · Sow
Start seeds indoors
Apr 8 – Apr 29
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 29 – May 20
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 13 – Jun 28
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Hamburg's 181-day season leaves this much room.
Summer squash / Zucchini 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 summer squash / zucchini outdoors in Hamburg?
Direct-sow around late April (Apr 29–May 20) in Hamburg, based on its local frost dates. Confidence 84%.
When will summer squash / zucchini be ready to harvest in Hamburg?
Expect to harvest from around mid June (Jun 13–Jun 28) in Hamburg, based on its local frost dates. Confidence 76%.
When should I start summer squash / zucchini seeds indoors in Hamburg?
Start seeds indoors around early April (Apr 8–Apr 29) in Hamburg, based on its local frost dates. Confidence 80%.
When can I transplant summer squash / zucchini outdoors in Hamburg?
Transplant outdoors around late April (Apr 29–May 20) 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 summer squash / zucchini to maturity outdoors.
The rule of thumb
Sow summer squash / zucchini 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. 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.