When to plant cauliflower in Spokane
Cauliflower 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 17 – May 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 16 – Jul 11
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 9 – Jun 23
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 15 – Sep 9
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Spokane's 162-day season leaves this much room.
Cauliflower 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 cauliflower be ready to harvest in Spokane?
Expect to harvest from around mid June (Jun 16–Jul 11) in Spokane, based on its local frost dates. Confidence 77%.
When should I start cauliflower 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 cauliflower outdoors in Spokane?
Transplant outdoors around mid April (Apr 17–May 8) in Spokane, based on its local frost dates. Confidence 83%.
Can I plant cauliflower in autumn in Spokane?
Yes — Spokane supports a second, autumn sowing of cauliflower around early June (Jun 9–Jun 23), 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 cauliflower to maturity outdoors.
The rule of thumb
Sow cauliflower 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.