When to plant sweet potato in New York City
Sweet potato is frost-tender, so every date keys off New York City's last spring frost of Mar 30.
Step 1 · Plant
Transplant outdoors
Jun 3 – Jun 24
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Sep 1 – Oct 1
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
New York City's 234-day season leaves this much room.
Sweet potato on New York 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
MAR 30
NOV 19
Common questions
When will sweet potato be ready to harvest in New York City?
Expect to harvest from around early September (Sep 1–Oct 1) in New York City, based on its local frost dates. Confidence 80%.
When can I transplant sweet potato outdoors in New York City?
Transplant outdoors around early June (Jun 3–Jun 24) in New York City, based on its local frost dates. Confidence 86%.
How long is the growing season in New York City?
New York City has roughly 234 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 New York City's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.