Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By reviewing the USDA zone info for Piedmont it's possible to estimate when to plant bidens.

Planting Calendar for Bidens

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

Since bidens require warm weather you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant bidens in Piedmont 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 bidens and expect a good harvest is probably August. If you wait any later than that and your bidens may not have a chance to really do well. If you are starting your bidens indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Piedmont. In the coldest months of winter you should expect an average low temperature of 0°F.

It's important to remember that USDA zone info for Piedmont is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Piedmont last frost occurs after April 15 so just be sure to be ready to cover your bidens in the event of a late frost.

USDA Zone Info for Piedmont

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 Low	0°F
Highest Expected Low	5°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 Piedmont

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