When to plant broccoli in Winnipeg

Broccoli is cold-hardy, so every date keys off Winnipeg's frost dates of May 8.
Step 1 · Sow
Start seeds indoors
Mar 27 – Apr 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 24 – May 15
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 23 – Jul 18
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 26 – Jul 10
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 1 – Sep 26
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Winnipeg's 154-day season leaves this much room.
Broccoli 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
MAY 8
OCT 10

Common questions

When will broccoli be ready to harvest in Winnipeg?

Expect to harvest from around late June (Jun 23–Jul 18) in Winnipeg, based on its local frost dates. Confidence 76%.

When should I start broccoli seeds indoors in Winnipeg?

Start seeds indoors around late March (Mar 27–Apr 17) in Winnipeg, based on its local frost dates. Confidence 80%.

When can I transplant broccoli outdoors in Winnipeg?

Transplant outdoors around late April (Apr 24–May 15) in Winnipeg, based on its local frost dates. Confidence 84%.

Can I plant broccoli in autumn in Winnipeg?

Yes — Winnipeg supports a second, autumn sowing of broccoli around late June (Jun 26–Jul 10), 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 broccoli to maturity outdoors.

The rule of thumb

Sow broccoli 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.