When to plant broccoli in Montana

Plant out in Billings

Apr 6–Apr 20

Across Montana the window opens between April 6 and May 16. Find your city below; the dates follow each town's own average last frost.

Start indoors, Billings: Feb 23–Mar 9
Plant out, Billings: Apr 6–Apr 20
Fall planting, Billings: Jul 15–Jul 29
Last frost, Billings: May 4

Start seeds indoors 8–10 weeks before the last frost; plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Broccoli grown for a fall harvest often tastes sweeter than spring broccoli. Light frost improves it.

Broccoli planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

BillingsApr 6–Apr 20

MissoulaApr 12–Apr 26

Great FallsApr 8–Apr 22

BozemanApr 28–May 12

Butte-Silver BowMay 16–May 30

HelenaApr 11–Apr 25

KalispellMay 3–May 17

Questions

When should I plant broccoli in Montana?

In Billings, plant out from April 6 to April 20. Across Montana the window opens between April 6 and May 16, depending on the local last frost.

How is this date worked out?

Start seeds indoors 8–10 weeks before the last frost; plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Montana

Broccoli in other states

Frost dates for every city in Montana