When to plant broccoli in Tulsa
Broccoli is cold-hardy, so every date keys off Tulsa's frost dates of Mar 31.
Step 1 · Sow
Start seeds indoors
Feb 17 – Mar 10
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 25 – Jan 15
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 23 – Mar 20
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 20 – Aug 3
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 25 – Oct 20
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Tulsa's 214-day season leaves this much room.
Broccoli on Tulsa'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 31
NOV 3
Common questions
When will broccoli be ready to harvest in Tulsa?
Expect to harvest from around late February (Feb 23–Mar 20) in Tulsa, based on its local frost dates. Confidence 79%.
When should I start broccoli seeds indoors in Tulsa?
Start seeds indoors around mid February (Feb 17–Mar 10) in Tulsa, based on its local frost dates. Confidence 84%.
When can I transplant broccoli outdoors in Tulsa?
Transplant outdoors around late December (Dec 25–Jan 15) in Tulsa, based on its local frost dates. Confidence 85%.
Can I plant broccoli in autumn in Tulsa?
Yes — Tulsa supports a second, autumn sowing of broccoli around mid July (Jul 20–Aug 3), timed to mature before the first fall frost.
How long is the growing season in Tulsa?
Tulsa has roughly 214 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 Tulsa's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.