The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when it's the best time to plant artemesia by checking out the USDA zone info for Missoula.

Planting Calendar for Artemesia

Frost tolerance for artemesia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since artemesia are barely cold tolerant you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant artemesia in Missoula is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant artemesia and expect a good harvest is probably August. If you wait any later than that and your artemesia may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your artemesia indoors.

Last Frost Date

The average date of last frost is April 15 in Missoula. You can expect an average low temperature of -15°F in the coldest months of winter.

It's important to remember that USDA zone info for Missoula is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Missoula you get surprised by a frost after April 15 be ready to cover your artemesia if you have one of those late frosts.

USDA Zone Info for Missoula

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Missoula

You may be interested in your other planting guides for Missoula.