When to plant sweet potato in Manchester
Sweet potato is frost-tender, so every date keys off Manchester's last spring frost of May 2.
Step 1 · Plant
Transplant outdoors
Jun 21 – Jul 12
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Sep 19 – Oct 19
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Manchester's 161-day season leaves this much room.
Sweet potato on Manchester'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 2
OCT 12
Common questions
When will sweet potato be ready to harvest in Manchester?
Expect to harvest from around mid September (Sep 19–Oct 19) in Manchester, based on its local frost dates. Confidence 78%.
When can I transplant sweet potato outdoors in Manchester?
Transplant outdoors around late June (Jun 21–Jul 12) in Manchester, based on its local frost dates. Confidence 84%.
How long is the growing season in Manchester?
Manchester has roughly 161 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 Manchester's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.