When to plant spinach in Glasgow
Spinach is cold-hardy, so every date keys off Glasgow's frost dates of May 1.
Step 1 · Sow
Direct sow outdoors
Mar 20 – Apr 10
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 29 – May 9
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 17 – Aug 31
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 3 – Oct 13
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Glasgow's 183-day season leaves this much room.
Spinach on Glasgow'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 27
Common questions
When can I sow spinach outdoors in Glasgow?
Direct-sow around mid March (Mar 20–Apr 10) in Glasgow, based on its local frost dates. Confidence 82%.
When will spinach be ready to harvest in Glasgow?
Expect to harvest from around late April (Apr 29–May 9) in Glasgow, based on its local frost dates. Confidence 74%.
Can I plant spinach in autumn in Glasgow?
Yes — Glasgow supports a second, autumn sowing of spinach around mid August (Aug 17–Aug 31), timed to mature before the first fall frost.
How long is the growing season in Glasgow?
Glasgow has roughly 183 frost-free days, which is enough time to grow spinach to maturity outdoors.
The rule of thumb
Sow spinach as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and Glasgow's frost dates.
Confidence 82/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.