When to plant onion in Fort Wayne
Onion is cold-hardy, so every date keys off Fort Wayne's frost dates of Apr 25.
Step 1 · Sow
Start seeds indoors
Feb 14 – Mar 7
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 22 – May 13
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 21 – Aug 10
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Fort Wayne's 172-day season leaves this much room.
Onion on Fort Wayne'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 17
Common questions
When will onion be ready to harvest in Fort Wayne?
Expect to harvest from around late July (Jul 21–Aug 10) in Fort Wayne, based on its local frost dates. Confidence 79%.
When should I start onion seeds indoors in Fort Wayne?
Start seeds indoors around mid February (Feb 14–Mar 7) in Fort Wayne, based on its local frost dates. Confidence 84%.
When can I transplant onion outdoors in Fort Wayne?
Transplant outdoors around late April (Apr 22–May 13) in Fort Wayne, based on its local frost dates. Confidence 85%.
How long is the growing season in Fort Wayne?
Fort Wayne has roughly 172 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 Fort Wayne's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.