When to plant sweet potato in Columbia
Sweet potato is frost-tender, so every date keys off Columbia's last spring frost of Mar 11.
Step 1 · Plant
Transplant outdoors
Apr 21 – May 12
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Jul 20 – Aug 19
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Columbia's 248-day season leaves this much room.
Sweet potato on Columbia'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 11
NOV 17
Common questions
When will sweet potato be ready to harvest in Columbia?
Expect to harvest from around mid July (Jul 20–Aug 19) in Columbia, based on its local frost dates. Confidence 79%.
When can I transplant sweet potato outdoors in Columbia?
Transplant outdoors around late April (Apr 21–May 12) in Columbia, based on its local frost dates. Confidence 88%.
How long is the growing season in Columbia?
Columbia has roughly 248 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 Columbia's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.