The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. 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 it's a good idea to plant ornamental grasses by using the USDA zone info for Piedmont.

Planting Calendar for Ornamental Grasses

Frost tolerance for ornamental grasses:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Ornamental Grasses do ok in moderate cold which tells us that you can start planting them slightly earlier than other frost tender plants.

The earliest that you can plant ornamental grasses in Piedmont 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 ornamental grasses and expect a good harvest is probably August. You probably don't want to wait any later than that or else your ornamental grasses may not have a chance to really do well. You can get started a little bit earlier by starting your ornamental grasses indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Piedmont. You should expect an average low temperature of 5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Piedmont may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Piedmont there is a last frost after April 15 so make sure that you are ready to protect your ornamental grasses in the event of a late frost.

USDA Zone Info for Piedmont

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°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 10°F.

Plants to Grow in Piedmont

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