When to plant cilantro / coriander in Riverside
Cilantro / Coriander is cold-hardy, so every date keys off Riverside's frost dates of Feb 16.
Step 1 · Sow
Direct sow outdoors
Feb 2 – Feb 23
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 19 – Apr 13
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 23 – Sep 6
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 14 – Nov 8
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Riverside's 293-day season leaves this much room.
Cilantro / Coriander on Riverside'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
FEB 16
DEC 6
Common questions
When can I sow cilantro / coriander outdoors in Riverside?
Direct-sow around early February (Feb 2–Feb 23) in Riverside, based on its local frost dates. Confidence 78%.
When will cilantro / coriander be ready to harvest in Riverside?
Expect to harvest from around mid March (Mar 19–Apr 13) in Riverside, based on its local frost dates. Confidence 70%.
Can I plant cilantro / coriander in autumn in Riverside?
Yes — Riverside supports a second, autumn sowing of cilantro / coriander around late August (Aug 23–Sep 6), timed to mature before the first fall frost.
How long is the growing season in Riverside?
Riverside has roughly 293 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 Riverside's frost dates.
Confidence 78/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.