When to plant bush (snap) bean in Detroit
Bush (snap) bean is frost-tender, so every date keys off Detroit's last spring frost of Apr 15.
Step 1 · Sow
Direct sow outdoors
May 31 – Jun 21
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jul 20 – Jul 30
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 60 d
Detroit's 194-day season leaves this much room.
Bush (snap) bean on Detroit'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 15
OCT 31
Common questions
When can I sow bush (snap) bean outdoors in Detroit?
Direct-sow around late May (May 31–Jun 21) in Detroit, based on its local frost dates. Confidence 85%.
When will bush (snap) bean be ready to harvest in Detroit?
Expect to harvest from around mid July (Jul 20–Jul 30) in Detroit, based on its local frost dates. Confidence 79%.
How long is the growing season in Detroit?
Detroit has roughly 194 frost-free days, which is enough time to grow bush (snap) bean to maturity outdoors.
The rule of thumb
Sow bush (snap) 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 Detroit's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.