When to plant sweet potato in Dunedin
Sweet potato is frost-tender, so every date keys off Dunedin's last spring frost of Oct 18.
Step 1 · Plant
Transplant outdoors
Nov 8 – Nov 29
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Feb 6 – Mar 7
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Dunedin's 178-day season leaves this much room.
Sweet potato on Dunedin'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
OCT 18
APR 14
Common questions
When will sweet potato be ready to harvest in Dunedin?
Expect to harvest from around early February (Feb 6–Mar 7) in Dunedin, based on its local frost dates. Confidence 61%.
When can I transplant sweet potato outdoors in Dunedin?
Transplant outdoors around early November (Nov 8–Nov 29) in Dunedin, based on its local frost dates. Confidence 68%.
How long is the growing season in Dunedin?
Dunedin has roughly 178 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 Dunedin's frost dates.
Confidence 68/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.