When to plant broccoli in Phoenix

Broccoli is cold-hardy, so every date keys off Phoenix's frost dates of Jan 27.
Step 1 · Sow
Start seeds indoors
Dec 16 – Jan 6
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 27 – Jan 17
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 25 – Mar 22
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 23 – Sep 6
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 29 – Nov 23
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Phoenix's 314-day season leaves this much room.
Broccoli on Phoenix'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
JAN 27
DEC 7

Common questions

When will broccoli be ready to harvest in Phoenix?

Expect to harvest from around late February (Feb 25–Mar 22) in Phoenix, based on its local frost dates. Confidence 74%.

When should I start broccoli seeds indoors in Phoenix?

Start seeds indoors around mid December (Dec 16–Jan 6) in Phoenix, based on its local frost dates. Confidence 78%.

When can I transplant broccoli outdoors in Phoenix?

Transplant outdoors around late December (Dec 27–Jan 17) in Phoenix, based on its local frost dates. Confidence 80%.

Can I plant broccoli in autumn in Phoenix?

Yes — Phoenix supports a second, autumn sowing of broccoli around late August (Aug 23–Sep 6), timed to mature before the first fall frost.

How long is the growing season in Phoenix?

Phoenix has roughly 314 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 Phoenix's frost dates.

Confidence 82/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.