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

You can estimate when to plant artemesia in Decorah by reviewing 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.

Since artemesia do ok in moderate cold you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant artemesia in Decorah is April. However, you really should wait until May 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 really do well. You can get started a little bit earlier by starting your artemesia indoors.

Last Frost Date

The average date of last frost is May 15 in Decorah. In the coldest months of winter you should expect an average low temperature of -25°F.

Remember that USDA zone info for Decorah may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Decorah there is a last frost after May 15 so make sure that you are prepared to cover your artemesia if you have a surprise late frost.

USDA Zone Info for Decorah

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Decorah

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