When to plant cilantro / coriander in Grand Rapids
Cilantro / Coriander is cold-hardy, so every date keys off Grand Rapids's frost dates of Apr 30.
Step 1 · Sow
Direct sow outdoors
Apr 22 – May 13
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 6 – Jul 1
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 2 – Jul 16
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Aug 23 – Sep 17
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Grand Rapids's 166-day season leaves this much room.
Cilantro / Coriander 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 cilantro / coriander outdoors in Grand Rapids?
Direct-sow around late April (Apr 22–May 13) in Grand Rapids, based on its local frost dates. Confidence 84%.
When will cilantro / coriander be ready to harvest in Grand Rapids?
Expect to harvest from around early June (Jun 6–Jul 1) in Grand Rapids, based on its local frost dates. Confidence 78%.
Can I plant cilantro / coriander in autumn in Grand Rapids?
Yes — Grand Rapids supports a second, autumn sowing of cilantro / coriander around early July (Jul 2–Jul 16), 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 cilantro / coriander to maturity outdoors.
The rule of thumb
Sow cilantro / coriander 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.