When to plant cilantro / coriander in New Haven
Cilantro / Coriander is cold-hardy, so every date keys off New Haven's frost dates of Apr 19.
Step 1 · Sow
Direct sow outdoors
Apr 9 – Apr 30
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 24 – Jun 18
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 6 – Jul 20
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Aug 27 – Sep 21
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
New Haven's 184-day season leaves this much room.
Cilantro / Coriander on New Haven'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 19
OCT 19
Common questions
When can I sow cilantro / coriander outdoors in New Haven?
Direct-sow around early April (Apr 9–Apr 30) in New Haven, based on its local frost dates. Confidence 81%.
When will cilantro / coriander be ready to harvest in New Haven?
Expect to harvest from around late May (May 24–Jun 18) in New Haven, based on its local frost dates. Confidence 75%.
Can I plant cilantro / coriander in autumn in New Haven?
Yes — New Haven supports a second, autumn sowing of cilantro / coriander around early July (Jul 6–Jul 20), timed to mature before the first fall frost.
How long is the growing season in New Haven?
New Haven has roughly 184 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 New Haven's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.