When to plant sweet corn in Edinburgh
Sweet corn is frost-tender, so every date keys off Edinburgh's last spring frost of May 1.
Step 1 · Sow
Direct sow outdoors
May 8 – May 29
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jul 7 – Aug 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 100 d
Edinburgh's 170-day season leaves this much room.
Sweet corn 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
HARVEST
MAY 1
OCT 18
Common questions
When can I sow sweet corn outdoors in Edinburgh?
Direct-sow around early May (May 8–May 29) in Edinburgh, based on its local frost dates. Confidence 82%.
When will sweet corn be ready to harvest in Edinburgh?
Expect to harvest from around early July (Jul 7–Aug 16) in Edinburgh, based on its local frost dates. Confidence 74%.
How long is the growing season in Edinburgh?
Edinburgh has roughly 170 frost-free days, which is enough time to grow sweet corn to maturity outdoors.
The rule of thumb
Sow sweet corn 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.