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When to plant broccoli in Kansas City

Broccoli is cold-hardy, so every date keys off Kansas City's frost dates of Apr 3.
Step 1 · Sow
Start seeds indoors
Feb 20 – Mar 13
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 20 – Apr 10
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 19 – Jun 13
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 16 – Jul 30
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 21 – Oct 16
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Kansas City's 212-day season leaves this much room.
Broccoli on Kansas City'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
APR 3
OCT 30

Common questions

When will broccoli be ready to harvest in Kansas City?

Expect to harvest from around mid May (May 19–Jun 13) in Kansas City, based on its local frost dates. Confidence 78%.

When should I start broccoli seeds indoors in Kansas City?

Start seeds indoors around mid February (Feb 20–Mar 13) in Kansas City, based on its local frost dates. Confidence 83%.

When can I transplant broccoli outdoors in Kansas City?

Transplant outdoors around mid March (Mar 20–Apr 10) in Kansas City, based on its local frost dates. Confidence 87%.

Can I plant broccoli in autumn in Kansas City?

Yes — Kansas City supports a second, autumn sowing of broccoli around mid July (Jul 16–Jul 30), timed to mature before the first fall frost.

How long is the growing season in Kansas City?

Kansas City has roughly 212 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 Kansas City's frost dates.

Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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