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

In Clarks Summit you can determine when you can plant black eyed susans by referring to the USDA zone info.

Planting Calendar for Black Eyed Susans

Frost tolerance for black eyed susans:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's not a good idea to plant black eyed susans until after all chance of frost has passed because they require warm weather.

The earliest that you can plant black eyed susans in Clarks Summit 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. You probably don't want to wait any later than that or else your black eyed susans may not have a chance to grow to maturity. You can get started a little bit earlier by starting your black eyed susans indoors.

Last Frost Date

In Clarks Summit the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Clarks Summit is an average and the actual date of last frost is different every year. Half of the time in Clarks Summit you get surprised by a frost after April 15 so be sure to be ready to cover your black eyed susans if you have a surprise late frost.

USDA Zone Info for Clarks Summit

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 Clarks Summit

You may be interested in your other planting guides for Clarks Summit.