When to plant onion in Orlando
Onion is cold-hardy, so every date keys off Orlando's frost dates of Jan 19.
Step 1 · Sow
Start seeds indoors
Nov 10 – Dec 1
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 29 – Jan 19
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Mar 29 – Apr 18
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Orlando's 336-day season leaves this much room.
Onion on Orlando'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
JAN 19
DEC 21
Common questions
When will onion be ready to harvest in Orlando?
Expect to harvest from around late March (Mar 29–Apr 18) in Orlando, based on its local frost dates. Confidence 72%.
When should I start onion seeds indoors in Orlando?
Start seeds indoors around early November (Nov 10–Dec 1) in Orlando, based on its local frost dates. Confidence 76%.
When can I transplant onion outdoors in Orlando?
Transplant outdoors around late December (Dec 29–Jan 19) in Orlando, based on its local frost dates. Confidence 80%.
How long is the growing season in Orlando?
Orlando has roughly 336 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 Orlando's frost dates.
Confidence 80/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.