One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of getting a good idea when it's possible to plant black eyed susans is to refer to the USDA zone info for Springfield.

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.

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

The earliest that you can plant black eyed susans in Springfield is March. However, you really should wait until April 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 September. If you wait any later than that and your black eyed susans may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your black eyed susans indoors.

Last Frost Date

The average date of last frost is February 15 in Springfield. It might get as low as 20°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Springfield is an average and the actual date of last frost is different every year. Since half of the time in Springfield last frost occurs after February 15 be ready to cover your black eyed susans in the event of one of those late frosts.

USDA Zone Info for Springfield

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Springfield

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