When to plant cilantro / coriander in Billings
Cilantro / Coriander is cold-hardy, so every date keys off Billings's frost dates of May 8.
Step 1 · Sow
Direct sow outdoors
Apr 24 – May 15
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 8 – Jul 3
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jun 19 – Jul 3
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Aug 10 – Sep 4
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Billings's 150-day season leaves this much room.
Cilantro / Coriander on Billings'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
MAY 8
OCT 4
Common questions
When can I sow cilantro / coriander outdoors in Billings?
Direct-sow around late April (Apr 24–May 15) in Billings, based on its local frost dates. Confidence 90%.
When will cilantro / coriander be ready to harvest in Billings?
Expect to harvest from around early June (Jun 8–Jul 3) in Billings, based on its local frost dates. Confidence 81%.
Can I plant cilantro / coriander in autumn in Billings?
Yes — Billings supports a second, autumn sowing of cilantro / coriander around mid June (Jun 19–Jul 3), timed to mature before the first fall frost.
How long is the growing season in Billings?
Billings has roughly 150 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 Billings's frost dates.
Confidence 90/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.