When to plant sweet potato in Oklahoma City
Sweet potato is frost-tender, so every date keys off Oklahoma City's last spring frost of Apr 3.
Step 1 · Plant
Transplant outdoors
May 15 – Jun 5
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Aug 13 – Sep 12
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Oklahoma City's 223-day season leaves this much room.
Sweet potato on Oklahoma City'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 3
NOV 5
Common questions
When will sweet potato be ready to harvest in Oklahoma City?
Expect to harvest from around mid August (Aug 13–Sep 12) in Oklahoma City, based on its local frost dates. Confidence 79%.
When can I transplant sweet potato outdoors in Oklahoma City?
Transplant outdoors around mid May (May 15–Jun 5) in Oklahoma City, based on its local frost dates. Confidence 85%.
How long is the growing season in Oklahoma City?
Oklahoma City has roughly 223 frost-free days, which is enough time to grow sweet potato to maturity outdoors.
The rule of thumb
Sow sweet potato 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Oklahoma City's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.