One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

You should be able to determine when you can plant black eyed susans by looking at the USDA zone info for Quakertown.

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.

Black Eyed Susans do not do well in cold weather which tells us that you have to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant black eyed susans in Quakertown 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. If you wait any later than that and your black eyed susans may not have a chance to fully mature. If you are starting your black eyed susans indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Quakertown. It might get as low as -5°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Quakertown is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Quakertown last frost occurs after April 15 so just be sure to be ready to protect your black eyed susans in the event of one of those late frosts.

USDA Zone Info for Quakertown

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

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

Plants to Grow in Quakertown

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