Perennial Flower

When to Plant Lavender in Wyoming

Fragrant, drought-tolerant, and beloved by pollinators. Once established, lavender rewards you for years.

The Short Answer

In Wyoming, plant lavender based on your regional frost dates. Eastern Wyoming has a last frost around May 10 - May 30, while Southern Wyoming sees frost end around May 15 - Jun 1. Short growing season. Very windy — wind protection essential for gardens. Low humidity. Cool nights even in summer at...

Wyoming Frost Dates

Your planting dates depend on which part of Wyoming you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Eastern Wyoming 4a, 4b, 5a May 10 - May 30 Sep 10 - Sep 25
Western Wyoming 3a, 3b, 4a May 25 - Jun 15 Aug 25 - Sep 15
Southern Wyoming 4b, 5a, 5b May 15 - Jun 1 Sep 5 - Sep 20

Lavender Planting Schedule for Wyoming

Eastern Wyoming (Zones 4a, 4b, 5a)

Average last frost: May 10 - May 30 · Average first frost: Sep 10 - Sep 25

Start Seeds Indoors
10 wks before frost
Transplant Outside
2 wks after frost

Western Wyoming (Zones 3a, 3b, 4a)

Average last frost: May 25 - Jun 15 · Average first frost: Aug 25 - Sep 15

Start Seeds Indoors
10 wks before frost
Transplant Outside
2 wks after frost

Southern Wyoming (Zones 4b, 5a, 5b)

Average last frost: May 15 - Jun 1 · Average first frost: Sep 5 - Sep 20

Start Seeds Indoors
10 wks before frost
Transplant Outside
2 wks after frost

Growing Lavender in Wyoming

Lavender in Wyoming's Climate

Lavender is challenging in cold climates — wet clay soil and cold winters are its enemies. English lavender (Hidcote, Munstead) is hardiest to zone 5. The key is drainage — raised beds with gravel and sand amendment are mandatory. Sandy soils of western Michigan and similar areas have a natural advantage. Mulch with pea gravel, not organic mulch, to prevent crown rot.

Soil Considerations for Wyoming

Alkaline, thin soils. Dry climate means little organic matter naturally. Wind erosion a significant challenge. Heavy amendment needed.

Wyoming Climate & Growing Season

Short growing season. Very windy — wind protection essential for gardens. Low humidity. Cool nights even in summer at elevation.

Growing season length varies across Wyoming: Eastern Wyoming (4a, 4b, 5a) has a last frost around May 10 - May 30, while Southern Wyoming (4b, 5a, 5b) sees frost end around May 15 - Jun 1. This difference matters for lavender — adjust your planting dates to match your specific region.

Growing Tips

Needs excellent drainage — clay soil is lavender's enemy. Don't prune into old wood. English varieties (Lavandula angustifolia) are hardiest.

Companion Planting

Plant lavender alongside these companions for better growth:

Roses Thyme Sage

The Bottom Line

Lavender can be grown successfully across Wyoming, but your exact planting dates depend on which region you're in. Eastern Wyoming gardeners should plan around a May 10 - May 30 last frost, while those in Southern Wyoming can typically plant later. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Lavender Growing Guide National planting guide with all states Wyoming Planting Calendar All plants for Wyoming Lavender in Alabama Alabama planting dates Lavender in Alaska Alaska planting dates Lavender in Arizona Arizona planting dates Lavender in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

Ready to Start Planting?

Enter your zip code and pick your plant. We'll tell you exactly when to plant, start seeds, and harvest — based on where you live.

Find Your Planting Dates