One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of making a decision about when it's possible to plant black eyed susans is to examine the USDA zone info for Caldwell.

Planting Calendar for Black Eyed Susans

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

It's probably a bad idea to 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 Caldwell 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 few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Caldwell. In the coldest months of winter you should expect an average low temperature of -5°F.

Since the USDA zone info for Caldwell may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Caldwell it frosts late in the year after April 15 so make sure that you are prepared to protect your black eyed susans in the event of a late frost.

USDA Zone Info for Caldwell

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 Caldwell

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