When to plant carrot in Portland
Carrot is cold-hardy, so every date keys off Portland's frost dates of Mar 1.
Step 1 · Sow
Direct sow outdoors
Feb 8 – Mar 1
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 9 – Apr 29
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 23 – Aug 6
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 28 – Oct 18
Maturity window for the second sowing.
Window
Days to maturity
60 – 80 d
Portland's 266-day season leaves this much room.
Carrot on Portland'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 1
NOV 22
Common questions
When can I sow carrot outdoors in Portland?
Direct-sow around early February (Feb 8–Mar 1) in Portland, based on its local frost dates. Confidence 88%.
When will carrot be ready to harvest in Portland?
Expect to harvest from around early April (Apr 9–Apr 29) in Portland, based on its local frost dates. Confidence 79%.
Can I plant carrot in autumn in Portland?
Yes — Portland supports a second, autumn sowing of carrot around late July (Jul 23–Aug 6), timed to mature before the first fall frost.
How long is the growing season in Portland?
Portland has roughly 266 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 Portland's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.