When to plant turnip in Duluth
Turnip is cold-hardy, so every date keys off Duluth's frost dates of May 10.
Step 1 · Sow
Direct sow outdoors
May 2 – May 23
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 11 – Jun 26
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 23 – Aug 6
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 8 – Sep 23
Maturity window for the second sowing.
Window
Days to maturity
40 – 55 d
Duluth's 150-day season leaves this much room.
Turnip on Duluth'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 10
OCT 7
Common questions
When can I sow turnip outdoors in Duluth?
Direct-sow around early May (May 2–May 23) in Duluth, based on its local frost dates. Confidence 84%.
When will turnip be ready to harvest in Duluth?
Expect to harvest from around mid June (Jun 11–Jun 26) in Duluth, based on its local frost dates. Confidence 78%.
Can I plant turnip in autumn in Duluth?
Yes — Duluth supports a second, autumn sowing of turnip around late July (Jul 23–Aug 6), timed to mature before the first fall frost.
How long is the growing season in Duluth?
Duluth has roughly 150 frost-free days, which is enough time to grow turnip to maturity outdoors.
The rule of thumb
Sow turnip 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 Duluth's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.