When to plant spinach in Montreal
Spinach is cold-hardy, so every date keys off Montreal's frost dates of May 11.
Step 1 · Sow
Direct sow outdoors
Mar 30 – Apr 20
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 9 – May 19
Picking runs until conditions turn against the crop.
Window
Days to maturity
40 – 50 d
Montreal's 142-day season leaves this much room.
Spinach on Montreal'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 11
SEP 30
Common questions
When can I sow spinach outdoors in Montreal?
Direct-sow around late March (Mar 30–Apr 20) in Montreal, based on its local frost dates. Confidence 86%.
When will spinach be ready to harvest in Montreal?
Expect to harvest from around early May (May 9–May 19) in Montreal, based on its local frost dates. Confidence 77%.
How long is the growing season in Montreal?
Montreal has roughly 142 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 Montreal's frost dates.
Confidence 86/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.