One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. 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 estimate when you can plant nierembergia by reviewing the USDA zone info for Centerville.

Planting Calendar for Nierembergia

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

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

The earliest that you can plant nierembergia in Centerville 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 few weeks earlier by starting your nierembergia indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Centerville. In the coldest months of winter you should expect an average low temperature of -15°F.

Always keep in mind that USDA zone info for Centerville is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Centerville it frosts late in the year after April 15 so make sure that you are ready to protect your nierembergia if you have one of those late frosts.

USDA Zone Info for Centerville

Here is the info for USDA Zone 5b.

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

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

Plants to Grow in Centerville

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