When to Plant Oregano in Montana

In a typical Montana location, start seeds indoors Mar 19 – Apr 2, then transplant outdoors May 14 – May 21. Across the state, the outdoor planting window starts as early as May 5 in Laurel and as late as Jun 13 in Butte.

Method Start indoors, then transplant

Days to maturity 80–90 days

Perennial herb; start indoors 6-8 weeks before last frost, transplant around/just after last frost date.

Oregano Planting Dates by City

City	Start indoors	Transplant
Billings	Mar 15 – Mar 29	May 10 – May 17
Missoula	Mar 15 – Mar 29	May 10 – May 17
Great Falls	Mar 11 – Mar 25	May 6 – May 13
Bozeman	Mar 31 – Apr 14	May 26 – Jun 2
Butte	Apr 18 – May 2	Jun 13 – Jun 20
Helena	Mar 14 – Mar 28	May 9 – May 16
Kalispell	Apr 5 – Apr 19	May 31 – Jun 7
Havre	Mar 20 – Apr 3	May 15 – May 22
Anaconda	Apr 6 – Apr 20	Jun 1 – Jun 8
Miles City	Mar 13 – Mar 27	May 8 – May 15
Helena Valley Southeast	Mar 14 – Mar 28	May 9 – May 16
Belgrade	Mar 31 – Apr 14	May 26 – Jun 2
Helena Valley West Central	Mar 14 – Mar 28	May 9 – May 16
Evergreen	Apr 5 – Apr 19	May 31 – Jun 7
Livingston	Apr 1 – Apr 15	May 27 – Jun 3
Whitefish	Mar 21 – Apr 4	May 16 – May 23
Laurel	Mar 10 – Mar 24	May 5 – May 12
Sidney	Mar 16 – Mar 30	May 11 – May 18
Lockwood	Mar 15 – Mar 29	May 10 – May 17
Lewistown	Mar 19 – Apr 2	May 14 – May 21

Showing the 20 most populous of 20 Montana cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Montana cities.

Frequently Asked Questions

When should I plant oregano in Montana?

When is the last frost in Montana?

The average last spring frost in Montana ranges from May 5 in Laurel to June 13 in Butte, based on NOAA 1991–2020 climate normals.

How long do oregano take to grow?

Oregano typically take 80–90 days from planting to harvest. Perennial herb; start indoors 6-8 weeks before last frost, transplant around/just after last frost date.

Other Crops in Montana

When to plant oregano in other states