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.

A common way of determining when it's the best time to plant violets is to use the USDA zone info for Stewartville.

Planting Calendar for Violets

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

You can plant violets a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant violets in Stewartville 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 violets and expect a good harvest is probably August. Any later than that and your violets may not have a chance to really do well. If you are starting your violets indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

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

Keep in mind that USDA zone info for Stewartville may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Stewartville you get a frost after May 15 so just be sure to be ready to cover your violets in the event of one of those late frosts.

USDA Zone Info for Stewartville

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 Stewartville

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