When to plant sweet potato in Green Bay
Sweet potato is frost-tender, so every date keys off Green Bay's last spring frost of May 4.
Step 1 · Plant
Transplant outdoors
Jun 19 – Jul 10
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Sep 17 – Oct 17
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Green Bay's 152-day season leaves this much room.
Sweet potato on Green Bay'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
MAY 4
OCT 5
Common questions
When will sweet potato be ready to harvest in Green Bay?
Expect to harvest from around mid September (Sep 17–Oct 17) in Green Bay, based on its local frost dates. Confidence 79%.
When can I transplant sweet potato outdoors in Green Bay?
Transplant outdoors around mid June (Jun 19–Jul 10) in Green Bay, based on its local frost dates. Confidence 85%.
How long is the growing season in Green Bay?
Green Bay has roughly 152 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 Green Bay's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.