When to plant spinach in Sioux Falls
Spinach is cold-hardy, so every date keys off Sioux Falls's frost dates of May 1.
Step 1 · Sow
Direct sow outdoors
Apr 6 – Apr 27
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 16 – May 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 18
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Sioux Falls's 153-day season leaves this much room.
Spinach on Sioux Falls'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 1
OCT 2
Common questions
When can I sow spinach outdoors in Sioux Falls?
Direct-sow around early April (Apr 6–Apr 27) in Sioux Falls, based on its local frost dates. Confidence 86%.
When will spinach be ready to harvest in Sioux Falls?
Expect to harvest from around mid May (May 16–May 26) in Sioux Falls, based on its local frost dates. Confidence 80%.
Can I plant spinach in autumn in Sioux Falls?
Yes — Sioux Falls supports a second, autumn sowing of spinach around late July (Jul 23–Aug 6), timed to mature before the first fall frost.
How long is the growing season in Sioux Falls?
Sioux Falls has roughly 153 frost-free days, which is enough time to grow spinach to maturity outdoors.
The rule of thumb
Sow spinach 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 Sioux Falls's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.