When to plant spinach in Cologne
Spinach is cold-hardy, so every date keys off Cologne's frost dates of Mar 26.
Step 1 · Sow
Direct sow outdoors
Feb 12 – Mar 5
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 24 – Apr 3
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Sep 7 – Sep 21
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 24 – Nov 3
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Cologne's 238-day season leaves this much room.
Spinach on Cologne'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
MAR 26
NOV 17
Common questions
When can I sow spinach outdoors in Cologne?
Direct-sow around mid February (Feb 12–Mar 5) in Cologne, based on its local frost dates. Confidence 89%.
When will spinach be ready to harvest in Cologne?
Expect to harvest from around late March (Mar 24–Apr 3) in Cologne, based on its local frost dates. Confidence 80%.
Can I plant spinach in autumn in Cologne?
Yes — Cologne supports a second, autumn sowing of spinach around early September (Sep 7–Sep 21), timed to mature before the first fall frost.
How long is the growing season in Cologne?
Cologne has roughly 238 frost-free days, which is enough time to grow spinach to maturity outdoors.
The rule of thumb
Sow spinach 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 Cologne's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.