When to plant garlic in Bismarck
Garlic is cold-hardy, so every date keys off Bismarck's frost dates of May 15.
Step 1 · Sow
Direct sow outdoors
Aug 28 – Sep 18
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 25 – Apr 25
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
Bismarck's 132-day season leaves this much room.
Garlic 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 garlic outdoors in Bismarck?
Direct-sow around late August (Aug 28–Sep 18) in Bismarck, based on its local frost dates. Confidence 89%.
When will garlic be ready to harvest in Bismarck?
Expect to harvest from around late April (Apr 25–Apr 25) 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 marginal time to grow garlic to maturity outdoors.
The rule of thumb
Sow garlic as soon as the soil is workable — it tolerates cool weather and light frost. 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.