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

In Mathis you can figure out when to plant nierembergia by reviewing the USDA zone info.

Planting Calendar for Nierembergia

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

Since nierembergia are not cold tolerant it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant nierembergia in Mathis 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 nierembergia and expect a good harvest is probably September. If you wait any later than that and your nierembergia may not have a chance to really do well. Starting your nierembergia indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Mathis. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Mathis is just an average the actual date of last frost changes from year to year. Half of the time in Mathis you get a frost after February 15 so make sure that you are prepared to protect your nierembergia in the event of a late frost.

USDA Zone Info for Mathis

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Mathis

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