One of the first steps you take when you are estimating your gardening schedule is find your 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.

The best time to plant violas in Lewistown can be estimated 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 earlier in the year than other plants that might not handle the cold.

The earliest that you can plant violas in Lewistown 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. If you are starting your violas indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Lewistown the average date of last frost happens on May 15. In the coldest months of winter you can expect an average low temperature of -30°F.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Lewistown and it is different every year. Half of the time in Lewistown there is a last frost after May 15 so be sure to be ready to protect your violas in the event of a surprise late frost.

USDA Zone Info for Lewistown

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Lewistown

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