When to plant pole bean in Bismarck
Pole bean is frost-tender, so every date keys off Bismarck's last spring frost of May 15.
Step 1 · Sow
Direct sow outdoors
Jun 7 – Jun 28
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Aug 6 – Aug 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 70 d
Bismarck's 132-day season leaves this much room.
Pole bean on Bismarck'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
MAY 15
SEP 25
Common questions
When can I sow pole bean outdoors in Bismarck?
Direct-sow around early June (Jun 7–Jun 28) in Bismarck, based on its local frost dates. Confidence 86%.
When will pole bean be ready to harvest in Bismarck?
Expect to harvest from around early August (Aug 6–Aug 16) in Bismarck, based on its local frost dates. Confidence 80%.
How long is the growing season in Bismarck?
Bismarck has roughly 132 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 Bismarck's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.