The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Bonne Terre you can figure out when to plant black eyed susans by using the USDA zone info.

Planting Calendar for Black Eyed Susans

Frost tolerance for black eyed susans:	Not tolerant of frost.
When to plant:	After the last frost.

You really shouldn't plant black eyed susans until after the last frost because they are not cold tolerant.

The earliest that you can plant black eyed susans in Bonne Terre 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 black eyed susans and expect a good harvest is probably August. Any later than that and your black eyed susans may not have a chance to really do well. You can get started a few weeks earlier by starting your black eyed susans indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Bonne Terre. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Bonne Terre may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Bonne Terre you get surprised by a frost after April 15 so make sure that you are ready to protect your black eyed susans in the event of a late frost.

USDA Zone Info for Bonne Terre

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 Bonne Terre

You may be interested in your other planting guides for Bonne Terre.