When to plant onion in Gulfport
Onion is cold-hardy, so every date keys off Gulfport's frost dates of Feb 20.
Step 1 · Sow
Start seeds indoors
Dec 12 – Jan 2
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jan 30 – Feb 20
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Apr 30 – May 20
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Gulfport's 287-day season leaves this much room.
Onion on Gulfport'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
FEB 20
NOV 29
Common questions
When will onion be ready to harvest in Gulfport?
Expect to harvest from around late April (Apr 30–May 20) in Gulfport, based on its local frost dates. Confidence 76%.
When should I start onion seeds indoors in Gulfport?
Start seeds indoors around mid December (Dec 12–Jan 2) in Gulfport, based on its local frost dates. Confidence 80%.
When can I transplant onion outdoors in Gulfport?
Transplant outdoors around late January (Jan 30–Feb 20) in Gulfport, based on its local frost dates. Confidence 84%.
How long is the growing season in Gulfport?
Gulfport has roughly 287 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 Gulfport's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.