When to plant sweet potato in Bristol
Sweet potato is frost-tender, so every date keys off Bristol's last spring frost of Apr 18.
Step 1 · Plant
Transplant outdoors
May 9 – May 30
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Aug 7 – Sep 6
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Bristol's 197-day season leaves this much room.
Sweet potato on Bristol'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
APR 18
NOV 1
Common questions
When will sweet potato be ready to harvest in Bristol?
Expect to harvest from around early August (Aug 7–Sep 6) in Bristol, based on its local frost dates. Confidence 74%.
When can I transplant sweet potato outdoors in Bristol?
Transplant outdoors around early May (May 9–May 30) in Bristol, based on its local frost dates. Confidence 82%.
How long is the growing season in Bristol?
Bristol has roughly 197 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 Bristol's frost dates.
Confidence 82/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.