When to plant cilantro / coriander in Detroit
Cilantro / Coriander is cold-hardy, so every date keys off Detroit's frost dates of Apr 15.
Step 1 · Sow
Direct sow outdoors
Apr 11 – May 2
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 26 – Jun 20
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 20 – Aug 3
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 10 – Oct 5
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Detroit's 194-day season leaves this much room.
Cilantro / Coriander on Detroit'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 15
OCT 31
Common questions
When can I sow cilantro / coriander outdoors in Detroit?
Direct-sow around mid April (Apr 11–May 2) in Detroit, based on its local frost dates. Confidence 85%.
When will cilantro / coriander be ready to harvest in Detroit?
Expect to harvest from around late May (May 26–Jun 20) in Detroit, based on its local frost dates. Confidence 79%.
Can I plant cilantro / coriander in autumn in Detroit?
Yes — Detroit supports a second, autumn sowing of cilantro / coriander around mid July (Jul 20–Aug 3), timed to mature before the first fall frost.
How long is the growing season in Detroit?
Detroit has roughly 194 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 Detroit's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.