When to plant beet in Seattle
Beet is cold-hardy, so every date keys off Seattle's frost dates of Mar 17.
Step 1 · Sow
Direct sow outdoors
Feb 24 – Mar 17
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 15 – May 5
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 31 – Aug 14
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 26 – Oct 16
Maturity window for the second sowing.
Window
Days to maturity
50 – 70 d
Seattle's 237-day season leaves this much room.
Beet on Seattle'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 17
NOV 13
Common questions
When can I sow beet outdoors in Seattle?
Direct-sow around late February (Feb 24–Mar 17) in Seattle, based on its local frost dates. Confidence 83%.
When will beet be ready to harvest in Seattle?
Expect to harvest from around mid April (Apr 15–May 5) in Seattle, based on its local frost dates. Confidence 75%.
Can I plant beet in autumn in Seattle?
Yes — Seattle supports a second, autumn sowing of beet around late July (Jul 31–Aug 14), timed to mature before the first fall frost.
How long is the growing season in Seattle?
Seattle has roughly 237 frost-free days, which is enough time to grow beet to maturity outdoors.
The rule of thumb
Sow beet 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 Seattle's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.