When to plant cauliflower in Tulsa
Cauliflower 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
Mar 17 – Apr 7
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 16 – Jun 10
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 8 – Jul 22
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 13 – Oct 8
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Tulsa's 214-day season leaves this much room.
Cauliflower 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 cauliflower be ready to harvest in Tulsa?
Expect to harvest from around mid May (May 16–Jun 10) in Tulsa, based on its local frost dates. Confidence 79%.
When should I start cauliflower 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 cauliflower outdoors in Tulsa?
Transplant outdoors around mid March (Mar 17–Apr 7) in Tulsa, based on its local frost dates. Confidence 88%.
Can I plant cauliflower in autumn in Tulsa?
Yes — Tulsa supports a second, autumn sowing of cauliflower around early July (Jul 8–Jul 22), 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 cauliflower to maturity outdoors.
The rule of thumb
Sow cauliflower 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.