When to plant broccoli in Billings
Broccoli is cold-hardy, so every date keys off Billings's frost dates of May 8.
Step 1 · Sow
Start seeds indoors
Mar 27 – Apr 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 24 – May 15
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 23 – Jul 18
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 20 – Jul 4
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 26 – Sep 20
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Billings's 150-day season leaves this much room.
Broccoli on Billings'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
MAY 8
OCT 4
Common questions
When will broccoli be ready to harvest in Billings?
Expect to harvest from around late June (Jun 23–Jul 18) in Billings, based on its local frost dates. Confidence 81%.
When should I start broccoli seeds indoors in Billings?
Start seeds indoors around late March (Mar 27–Apr 17) in Billings, based on its local frost dates. Confidence 86%.
When can I transplant broccoli outdoors in Billings?
Transplant outdoors around late April (Apr 24–May 15) in Billings, based on its local frost dates. Confidence 90%.
Can I plant broccoli in autumn in Billings?
Yes — Billings supports a second, autumn sowing of broccoli around mid June (Jun 20–Jul 4), timed to mature before the first fall frost.
How long is the growing season in Billings?
Billings has roughly 150 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 Billings's frost dates.
Confidence 90/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.