When to plant spinach in Grand Rapids
Spinach is cold-hardy, so every date keys off Grand Rapids's frost dates of Apr 30.
Step 1 · Sow
Direct sow outdoors
Apr 5 – Apr 26
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 15 – May 25
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 6 – Aug 20
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 22 – Oct 2
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Grand Rapids's 166-day season leaves this much room.
Spinach on Grand Rapids'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 30
OCT 16
Common questions
When can I sow spinach outdoors in Grand Rapids?
Direct-sow around early April (Apr 5–Apr 26) in Grand Rapids, based on its local frost dates. Confidence 84%.
When will spinach be ready to harvest in Grand Rapids?
Expect to harvest from around mid May (May 15–May 25) in Grand Rapids, based on its local frost dates. Confidence 78%.
Can I plant spinach in autumn in Grand Rapids?
Yes — Grand Rapids supports a second, autumn sowing of spinach around early August (Aug 6–Aug 20), timed to mature before the first fall frost.
How long is the growing season in Grand Rapids?
Grand Rapids has roughly 166 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 Grand Rapids's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.