When to plant carrot in Boston
Carrot is cold-hardy, so every date keys off Boston's frost dates of Apr 4.
Step 1 · Sow
Direct sow outdoors
Apr 7 – Apr 28
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 6 – Jun 26
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 22 – Aug 5
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 27 – Oct 17
Maturity window for the second sowing.
Window
Days to maturity
60 – 80 d
Boston's 220-day season leaves this much room.
Carrot on Boston'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 4
NOV 9
Common questions
When can I sow carrot outdoors in Boston?
Direct-sow around early April (Apr 7–Apr 28) in Boston, based on its local frost dates. Confidence 86%.
When will carrot be ready to harvest in Boston?
Expect to harvest from around early June (Jun 6–Jun 26) in Boston, based on its local frost dates. Confidence 80%.
Can I plant carrot in autumn in Boston?
Yes — Boston supports a second, autumn sowing of carrot around late July (Jul 22–Aug 5), timed to mature before the first fall frost.
How long is the growing season in Boston?
Boston has roughly 220 frost-free days, which is enough time to grow carrot to maturity outdoors.
The rule of thumb
Sow carrot 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 Boston's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.