When to plant turnip in Denver
Turnip is cold-hardy, so every date keys off Denver's frost dates of May 4.
Step 1 · Sow
Direct sow outdoors
Apr 13 – May 4
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 23 – Jun 7
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 26 – Aug 9
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 11 – Sep 26
Maturity window for the second sowing.
Window
Days to maturity
40 – 55 d
Denver's 157-day season leaves this much room.
Turnip on Denver'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 4
OCT 10
Common questions
When can I sow turnip outdoors in Denver?
Direct-sow around mid April (Apr 13–May 4) in Denver, based on its local frost dates. Confidence 85%.
When will turnip be ready to harvest in Denver?
Expect to harvest from around late May (May 23–Jun 7) in Denver, based on its local frost dates. Confidence 76%.
Can I plant turnip in autumn in Denver?
Yes — Denver supports a second, autumn sowing of turnip around late July (Jul 26–Aug 9), timed to mature before the first fall frost.
How long is the growing season in Denver?
Denver has roughly 157 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 Denver's frost dates.
Confidence 85/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.