When to plant broccoli in Cheyenne
Broccoli is cold-hardy, so every date keys off Cheyenne's frost dates of May 13.
Step 1 · Sow
Start seeds indoors
Apr 1 – Apr 22
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 29 – May 20
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 28 – Jul 23
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 18 – Jul 2
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 24 – Sep 18
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Cheyenne's 136-day season leaves this much room.
Broccoli on Cheyenne'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 13
OCT 2
Common questions
When will broccoli be ready to harvest in Cheyenne?
Expect to harvest from around late June (Jun 28–Jul 23) in Cheyenne, based on its local frost dates. Confidence 80%.
When should I start broccoli seeds indoors in Cheyenne?
Start seeds indoors around early April (Apr 1–Apr 22) in Cheyenne, based on its local frost dates. Confidence 85%.
When can I transplant broccoli outdoors in Cheyenne?
Transplant outdoors around late April (Apr 29–May 20) in Cheyenne, based on its local frost dates. Confidence 89%.
Can I plant broccoli in autumn in Cheyenne?
Yes — Cheyenne supports a second, autumn sowing of broccoli around mid June (Jun 18–Jul 2), timed to mature before the first fall frost.
How long is the growing season in Cheyenne?
Cheyenne has roughly 136 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 Cheyenne's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.