When to plant cilantro / coriander in Indianapolis
Cilantro / Coriander is cold-hardy, so every date keys off Indianapolis's frost dates of Apr 17.
Step 1 · Sow
Direct sow outdoors
Apr 7 – Apr 28
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 22 – Jun 16
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
Indianapolis's 178-day season leaves this much room.
Cilantro / Coriander on Indianapolis'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 17
OCT 14
Common questions
When can I sow cilantro / coriander outdoors in Indianapolis?
Direct-sow around early April (Apr 7–Apr 28) in Indianapolis, based on its local frost dates. Confidence 81%.
When will cilantro / coriander be ready to harvest in Indianapolis?
Expect to harvest from around late May (May 22–Jun 16) in Indianapolis, based on its local frost dates. Confidence 75%.
Can I plant cilantro / coriander in autumn in Indianapolis?
Yes — Indianapolis 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 Indianapolis?
Indianapolis has roughly 178 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 Indianapolis's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.