When to plant onion in Little Rock
Onion is cold-hardy, so every date keys off Little Rock's frost dates of Mar 16.
Step 1 · Sow
Start seeds indoors
Jan 5 – Jan 26
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 2 – Mar 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 31 – Jun 20
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
Little Rock's 239-day season leaves this much room.
Onion on Little Rock'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 16
NOV 15
Common questions
When will onion be ready to harvest in Little Rock?
Expect to harvest from around late May (May 31–Jun 20) in Little Rock, based on its local frost dates. Confidence 80%.
When should I start onion seeds indoors in Little Rock?
Start seeds indoors around early January (Jan 5–Jan 26) in Little Rock, based on its local frost dates. Confidence 85%.
When can I transplant onion outdoors in Little Rock?
Transplant outdoors around early March (Mar 2–Mar 23) in Little Rock, based on its local frost dates. Confidence 86%.
How long is the growing season in Little Rock?
Little Rock has roughly 239 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 Little Rock's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.