When to plant broccoli in Columbia

Broccoli is cold-hardy, so every date keys off Columbia's frost dates of Mar 11.
Step 1 · Sow
Start seeds indoors
Jan 28 – Feb 18
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Feb 25 – Mar 18
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Apr 26 – May 21
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 3 – Aug 17
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 9 – Nov 3
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Columbia's 248-day season leaves this much room.
Broccoli on Columbia'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
MAR 11
NOV 17

Common questions

When will broccoli be ready to harvest in Columbia?

Expect to harvest from around late April (Apr 26–May 21) in Columbia, based on its local frost dates. Confidence 79%.

When should I start broccoli seeds indoors in Columbia?

Start seeds indoors around late January (Jan 28–Feb 18) in Columbia, based on its local frost dates. Confidence 84%.

When can I transplant broccoli outdoors in Columbia?

Transplant outdoors around late February (Feb 25–Mar 18) in Columbia, based on its local frost dates. Confidence 88%.

Can I plant broccoli in autumn in Columbia?

Yes — Columbia supports a second, autumn sowing of broccoli around early August (Aug 3–Aug 17), timed to mature before the first fall frost.

How long is the growing season in Columbia?

Columbia has roughly 248 frost-free days, which is enough time to grow broccoli to maturity outdoors.

The rule of thumb

Sow broccoli 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 Columbia's frost dates.

Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.