When to plant sweet potato in Edinburgh
Sweet potato is frost-tender, so every date keys off Edinburgh's last spring frost of May 1.
Step 1 · Plant
Transplant outdoors
May 22 – Jun 12
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Aug 20 – Sep 19
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Edinburgh's 170-day season leaves this much room.
Sweet potato on Edinburgh'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 1
OCT 18
Common questions
When will sweet potato be ready to harvest in Edinburgh?
Expect to harvest from around mid August (Aug 20–Sep 19) in Edinburgh, based on its local frost dates. Confidence 74%.
When can I transplant sweet potato outdoors in Edinburgh?
Transplant outdoors around late May (May 22–Jun 12) in Edinburgh, based on its local frost dates. Confidence 82%.
How long is the growing season in Edinburgh?
Edinburgh has roughly 170 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 Edinburgh's frost dates.
Confidence 82/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.