When to plant sweet potato in Wellington
Sweet potato is frost-tender, so every date keys off Wellington's last spring frost of Sep 19.
Step 1 · Plant
Transplant outdoors
Feb 2 – Feb 23
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
May 3 – Jun 2
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Wellington's 256-day season leaves this much room.
Sweet potato on Wellington'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
SEP 19
JUN 2
Common questions
When will sweet potato be ready to harvest in Wellington?
Expect to harvest from around early May (May 3–Jun 2) in Wellington, based on its local frost dates. Confidence 45%.
When can I transplant sweet potato outdoors in Wellington?
Transplant outdoors around early February (Feb 2–Feb 23) in Wellington, based on its local frost dates. Confidence 48%.
How long is the growing season in Wellington?
Wellington has roughly 256 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 Wellington's frost dates.
Confidence 50/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.