When to plant carrot in Philadelphia
Carrot is cold-hardy, so every date keys off Philadelphia's frost dates of Mar 28.
Step 1 · Sow
Direct sow outdoors
Mar 23 – Apr 13
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 22 – Jun 11
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 29 – Aug 12
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 4 – Oct 24
Maturity window for the second sowing.
Window
Days to maturity
60 – 80 d
Philadelphia's 234-day season leaves this much room.
Carrot on Philadelphia'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
MAR 28
NOV 22
Common questions
When can I sow carrot outdoors in Philadelphia?
Direct-sow around late March (Mar 23–Apr 13) in Philadelphia, based on its local frost dates. Confidence 84%.
When will carrot be ready to harvest in Philadelphia?
Expect to harvest from around late May (May 22–Jun 11) in Philadelphia, based on its local frost dates. Confidence 78%.
Can I plant carrot in autumn in Philadelphia?
Yes — Philadelphia supports a second, autumn sowing of carrot around late July (Jul 29–Aug 12), timed to mature before the first fall frost.
How long is the growing season in Philadelphia?
Philadelphia has roughly 234 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 Philadelphia's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.