When to plant tomato in Winnipeg
Tomato is frost-tender, so every date keys off Winnipeg's last spring frost 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
Jun 1 – Jun 22
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 31 – Aug 25
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Winnipeg's 118-day season leaves this much room.
Tomato 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 will tomato be ready to harvest in Winnipeg?
Expect to harvest from around late July (Jul 31–Aug 25) in Winnipeg, based on its local frost dates. Confidence 65%.
When should I start tomato 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 tomato outdoors in Winnipeg?
Transplant outdoors around early June (Jun 1–Jun 22) 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 tomato to maturity outdoors.
The rule of thumb
Sow tomato 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 Winnipeg's frost dates.
Confidence 72/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.