When to plant pole bean in Seattle
Pole bean is frost-tender, so every date keys off Seattle's last spring frost of Mar 17.
Step 1 · Sow
Direct sow outdoors
Jun 6 – Jun 27
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Aug 5 – Aug 15
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 70 d
Seattle's 237-day season leaves this much room.
Pole bean on Seattle'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
MAR 17
NOV 13
Common questions
When can I sow pole bean outdoors in Seattle?
Direct-sow around early June (Jun 6–Jun 27) in Seattle, based on its local frost dates. Confidence 81%.
When will pole bean be ready to harvest in Seattle?
Expect to harvest from around early August (Aug 5–Aug 15) in Seattle, based on its local frost dates. Confidence 75%.
How long is the growing season in Seattle?
Seattle has roughly 237 frost-free days, which is enough time to grow pole bean to maturity outdoors.
The rule of thumb
Sow pole bean 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 Seattle's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.