When to plant spinach in Cincinnati
Spinach is cold-hardy, so every date keys off Cincinnati's frost dates of Apr 13.
Step 1 · Sow
Direct sow outdoors
Mar 3 – Mar 24
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 12 – Apr 22
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 12 – Aug 26
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 28 – Oct 8
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Cincinnati's 194-day season leaves this much room.
Spinach on Cincinnati'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
APR 13
OCT 22
Common questions
When can I sow spinach outdoors in Cincinnati?
Direct-sow around early March (Mar 3–Mar 24) in Cincinnati, based on its local frost dates. Confidence 85%.
When will spinach be ready to harvest in Cincinnati?
Expect to harvest from around mid April (Apr 12–Apr 22) in Cincinnati, based on its local frost dates. Confidence 79%.
Can I plant spinach in autumn in Cincinnati?
Yes — Cincinnati supports a second, autumn sowing of spinach around mid August (Aug 12–Aug 26), timed to mature before the first fall frost.
How long is the growing season in Cincinnati?
Cincinnati has roughly 194 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 Cincinnati's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.