When to plant pole bean in Portland
Pole bean is frost-tender, so every date keys off Portland's last spring frost of Mar 1.
Step 1 · Sow
Direct sow outdoors
Jun 5 – Jun 26
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Aug 4 – Aug 14
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 70 d
Portland's 266-day season leaves this much room.
Pole bean on Portland'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 1
NOV 22
Common questions
When can I sow pole bean outdoors in Portland?
Direct-sow around early June (Jun 5–Jun 26) in Portland, based on its local frost dates. Confidence 85%.
When will pole bean be ready to harvest in Portland?
Expect to harvest from around early August (Aug 4–Aug 14) in Portland, based on its local frost dates. Confidence 79%.
How long is the growing season in Portland?
Portland has roughly 266 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 Portland's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.