When to plant broccoli in Spokane
Broccoli is cold-hardy, so every date keys off Spokane's frost dates of Apr 30.
Step 1 · Sow
Start seeds indoors
Mar 19 – Apr 9
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 16 – May 7
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 15 – Jul 10
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 25 – Jul 9
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 31 – Sep 25
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Spokane's 162-day season leaves this much room.
Broccoli on Spokane'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
APR 30
OCT 9
Common questions
When will broccoli be ready to harvest in Spokane?
Expect to harvest from around mid June (Jun 15–Jul 10) in Spokane, based on its local frost dates. Confidence 77%.
When should I start broccoli seeds indoors in Spokane?
Start seeds indoors around mid March (Mar 19–Apr 9) in Spokane, based on its local frost dates. Confidence 82%.
When can I transplant broccoli outdoors in Spokane?
Transplant outdoors around mid April (Apr 16–May 7) in Spokane, based on its local frost dates. Confidence 86%.
Can I plant broccoli in autumn in Spokane?
Yes — Spokane supports a second, autumn sowing of broccoli around late June (Jun 25–Jul 9), timed to mature before the first fall frost.
How long is the growing season in Spokane?
Spokane has roughly 162 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 Spokane's frost dates.
Confidence 86/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.