When to plant potato in Spokane
Potato is cold-hardy, so every date keys off Spokane's frost dates of Apr 30.
Step 1 · Sow
Direct sow outdoors
Apr 17 – May 8
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 26 – Aug 15
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 120 d
Spokane's 162-day season leaves this much room.
Potato 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
HARVEST
APR 30
OCT 9
Common questions
When can I sow potato outdoors in Spokane?
Direct-sow around mid April (Apr 17–May 8) in Spokane, based on its local frost dates. Confidence 83%.
When will potato be ready to harvest in Spokane?
Expect to harvest from around late June (Jun 26–Aug 15) in Spokane, based on its local frost dates. Confidence 77%.
How long is the growing season in Spokane?
Spokane has roughly 162 frost-free days, which is enough time to grow potato to maturity outdoors.
The rule of thumb
Sow potato 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.