When to plant radish in Bismarck
Radish is cold-hardy, so every date keys off Bismarck's frost dates of May 15.
Step 1 · Sow
Direct sow outdoors
Apr 21 – May 12
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 16 – May 21
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 5 – Aug 19
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 6 – Sep 11
Maturity window for the second sowing.
Window
Days to maturity
25 – 30 d
Bismarck's 132-day season leaves this much room.
Radish 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 radish outdoors in Bismarck?
Direct-sow around late April (Apr 21–May 12) in Bismarck, based on its local frost dates. Confidence 86%.
When will radish be ready to harvest in Bismarck?
Expect to harvest from around mid May (May 16–May 21) in Bismarck, based on its local frost dates. Confidence 80%.
Can I plant radish in autumn in Bismarck?
Yes — Bismarck supports a second, autumn sowing of radish around early August (Aug 5–Aug 19), timed to mature before the first fall frost.
How long is the growing season in Bismarck?
Bismarck has roughly 132 frost-free days, which is enough time to grow radish to maturity outdoors.
The rule of thumb
Sow radish 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.