Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of figuring out when it's a good idea to plant nierembergia is to examine the USDA zone info for Rock Hill.

Planting Calendar for Nierembergia

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

You can not plant nierembergia until after the last frost because they do not do well in cold weather.

The earliest that you can plant nierembergia in Rock Hill 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 nierembergia and expect a good harvest is probably August. Any later than that and your nierembergia may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your nierembergia indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Rock Hill. In the coldest months of winter you should expect an average low temperature of 10°F.

Since the USDA zone info for Rock Hill is not always accurate the actual date of last frost is different every year. Half of the time in Rock Hill you get surprised by a frost after March 15 so just be sure to be ready to cover your nierembergia if you have a late frost.

USDA Zone Info for Rock Hill

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Rock Hill

You may be interested in your other planting guides for Rock Hill.