When to plant tomato in Spokane
Tomato is frost-tender, so every date keys off Spokane's last spring frost of Apr 30.
Step 1 · Sow
Start seeds indoors
Mar 31 – Apr 21
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 11 – Jul 2
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 10 – Sep 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Spokane's 162-day season leaves this much room.
Tomato 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 tomato be ready to harvest in Spokane?
Expect to harvest from around early August (Aug 10–Sep 4) in Spokane, based on its local frost dates. Confidence 77%.
When should I start tomato seeds indoors in Spokane?
Start seeds indoors around late March (Mar 31–Apr 21) in Spokane, based on its local frost dates. Confidence 82%.
When can I transplant tomato outdoors in Spokane?
Transplant outdoors around mid June (Jun 11–Jul 2) in Spokane, based on its local frost dates. Confidence 83%.
How long is the growing season in Spokane?
Spokane has roughly 162 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 Spokane's frost dates.
Confidence 86/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.