When to plant spinach in Hartford
Spinach is cold-hardy, so every date keys off Hartford's frost dates of Apr 14.
Step 1 · Sow
Direct sow outdoors
Mar 31 – Apr 21
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 10 – May 20
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 9 – Aug 23
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 25 – Oct 5
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Hartford's 188-day season leaves this much room.
Spinach on Hartford'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 14
OCT 19
Common questions
When can I sow spinach outdoors in Hartford?
Direct-sow around late March (Mar 31–Apr 21) in Hartford, based on its local frost dates. Confidence 86%.
When will spinach be ready to harvest in Hartford?
Expect to harvest from around early May (May 10–May 20) in Hartford, based on its local frost dates. Confidence 80%.
Can I plant spinach in autumn in Hartford?
Yes — Hartford supports a second, autumn sowing of spinach around early August (Aug 9–Aug 23), timed to mature before the first fall frost.
How long is the growing season in Hartford?
Hartford has roughly 188 frost-free days, which is enough time to grow spinach to maturity outdoors.
The rule of thumb
Sow spinach 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 Hartford's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.