Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The best time to plant heuchera in Owatonna should be estimated by checking out the USDA zone info.

Planting Calendar for Heuchera

Frost tolerance for heuchera:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Heuchera do well in moderate cold which means that you can plant them a little bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant heuchera in Owatonna 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 heuchera and expect a good harvest is probably August. You probably don't want to wait any later than that or else your heuchera may not have a chance to really do well. Starting your heuchera indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Owatonna is an average the actual date of last frost changes from year to year. Half of the time in Owatonna you get a frost after May 15 so always be ready to cover your heuchera if you have a surprise late frost.

USDA Zone Info for Owatonna

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 Owatonna

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