When to plant kale in Winnipeg
Kale is cold-hardy, so every date keys off Winnipeg's frost dates of May 25.
Step 1 · Sow
Start seeds indoors
Apr 13 – May 4
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 4 – May 25
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 28 – Jul 18
Picking runs until conditions turn against the crop.
Window
Days to maturity
55 – 75 d
Winnipeg's 118-day season leaves this much room.
Kale 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 25
SEP 20
Common questions
When can I sow kale outdoors in Winnipeg?
Direct-sow around early May (May 4–May 25) in Winnipeg, based on its local frost dates. Confidence 72%.
When will kale be ready to harvest in Winnipeg?
Expect to harvest from around late June (Jun 28–Jul 18) in Winnipeg, based on its local frost dates. Confidence 65%.
When should I start kale seeds indoors in Winnipeg?
Start seeds indoors around mid April (Apr 13–May 4) in Winnipeg, based on its local frost dates. Confidence 68%.
When can I transplant kale outdoors in Winnipeg?
Transplant outdoors around early May (May 4–May 25) in Winnipeg, based on its local frost dates. Confidence 72%.
How long is the growing season in Winnipeg?
Winnipeg has roughly 118 frost-free days, which is enough time to grow kale to maturity outdoors.
The rule of thumb
Sow kale 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 72/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.