When to plant onion in Tallahassee
Onion is cold-hardy, so every date keys off Tallahassee's frost dates of Mar 14.
Step 1 · Sow
Start seeds indoors
Jan 3 – Jan 24
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Feb 21 – Mar 14
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 22 – Jun 11
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Tallahassee's 248-day season leaves this much room.
Onion on Tallahassee'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 14
NOV 22
Common questions
When will onion be ready to harvest in Tallahassee?
Expect to harvest from around late May (May 22–Jun 11) in Tallahassee, based on its local frost dates. Confidence 80%.
When should I start onion seeds indoors in Tallahassee?
Start seeds indoors around early January (Jan 3–Jan 24) in Tallahassee, based on its local frost dates. Confidence 85%.
When can I transplant onion outdoors in Tallahassee?
Transplant outdoors around late February (Feb 21–Mar 14) in Tallahassee, based on its local frost dates. Confidence 89%.
How long is the growing season in Tallahassee?
Tallahassee has roughly 248 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 Tallahassee's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.