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

The earliest that you can plant torenia in Ballwin can be figured out by referring to the USDA zone info.

Planting Calendar for Torenia

Frost tolerance for torenia:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Torenia require warm weather which tells us that it's important to wait until it warms up after the last frost before you can plant them.

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

Last Frost Date

The average date of last frost is April 15 in Ballwin. In the coldest months of winter you can expect an average low temperature of -10°F.

It's important to remember that USDA zone info for Ballwin may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Ballwin you get surprised by a frost after April 15 be ready to cover your torenia in the event of one of those late frosts.

USDA Zone Info for Ballwin

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Ballwin

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