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.

In Mankato you can figure out when to plant violas by checking out the USDA zone info.

Planting Calendar for Violas

Frost tolerance for violas:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Violas do ok in cold weather which means that you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant violas in Mankato 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 violas and expect a good harvest is probably August. Any later than that and your violas may not have a chance to really do well. You can get started a little bit earlier by starting your violas indoors.

Last Frost Date

The average date of last frost is May 15 in Mankato. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Mankato is not always accurate the actual date of last frost is different every year. Half of the time in Mankato last frost occurs after May 15 so just be sure to be ready to protect your violas if you have one of those late frosts.

USDA Zone Info for Mankato

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 Mankato

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