One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can determine when you can plant artemesia in Columbia Falls by referring to the USDA zone info.

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.

You can plant artemesia just a tiny bit earlier in the year because they are one of those plants that can tolerate a tiny bit of cold weather.

The earliest that you can plant artemesia in Columbia Falls 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. You probably don't want to wait any later than that or else your artemesia may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your artemesia indoors.

Last Frost Date

The average date of last frost is April 15 in Columbia Falls. You can expect an average low temperature of -20°F in the coldest months of winter.

It's important to remember that USDA zone info for Columbia Falls may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Columbia Falls there is a last frost after April 15 be ready to protect your artemesia in the event of a surprise late frost.

USDA Zone Info for Columbia Falls

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Columbia Falls

You may be interested in your other planting guides for Columbia Falls.