When to plant spinach in Winnipeg
Spinach is cold-hardy, so every date keys off Winnipeg's frost dates of May 8.
Step 1 · Sow
Direct sow outdoors
Apr 22 – May 13
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 1 – Jun 11
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 31 – Aug 14
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 16 – Sep 26
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Winnipeg's 154-day season leaves this much room.
Spinach on Winnipeg'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 8
OCT 10
Common questions
When can I sow spinach outdoors in Winnipeg?
Direct-sow around late April (Apr 22–May 13) in Winnipeg, based on its local frost dates. Confidence 81%.
When will spinach be ready to harvest in Winnipeg?
Expect to harvest from around early June (Jun 1–Jun 11) in Winnipeg, based on its local frost dates. Confidence 76%.
Can I plant spinach in autumn in Winnipeg?
Yes — Winnipeg supports a second, autumn sowing of spinach around late July (Jul 31–Aug 14), timed to mature before the first fall frost.
How long is the growing season in Winnipeg?
Winnipeg has roughly 154 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 Winnipeg's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.