When to Plant Black Eyed Susans in Mechanicsburg, PA

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.

By referring to the USDA zone info for Mechanicsburg you will be able to figure out when to plant black eyed susans.


Planting Calendar for Black Eyed Susans

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

Since black eyed susans require warm weather it is necessary to wait until after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant black eyed susans
Possibly ok, but a risky time to plant black eyed susans
Probably not a good time to plant black eyed susans

The earliest that you can plant black eyed susans in Mechanicsburg 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. Starting your black eyed susans indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Mechanicsburg the average date of last frost happens on April 15. You should expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Mechanicsburg is just an average the actual date of last frost is different every year. Half of the time in Mechanicsburg you get a frost after April 15 so always be ready to cover your black eyed susans in the event of a late frost.

USDA Zone Info for Mechanicsburg

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low0°F
Highest Expected Low5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Mechanicsburg

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