When to plant onion in Munich
Onion is cold-hardy, so every date keys off Munich's frost dates of May 8.
Step 1 · Sow
Start seeds indoors
Feb 27 – Mar 20
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 17 – May 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 16 – Aug 5
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Munich's 146-day season leaves this much room.
Onion on Munich'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
MAY 8
OCT 1
Common questions
When will onion be ready to harvest in Munich?
Expect to harvest from around mid July (Jul 16–Aug 5) in Munich, based on its local frost dates. Confidence 76%.
When should I start onion seeds indoors in Munich?
Start seeds indoors around late February (Feb 27–Mar 20) in Munich, based on its local frost dates. Confidence 80%.
When can I transplant onion outdoors in Munich?
Transplant outdoors around mid April (Apr 17–May 8) in Munich, based on its local frost dates. Confidence 84%.
How long is the growing season in Munich?
Munich has roughly 146 frost-free days, which is enough time to grow onion to maturity outdoors.
The rule of thumb
Sow onion 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 Munich's frost dates.
Confidence 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.