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.

A common way of figuring out when it's a good idea to plant nierembergia is to refer to the USDA zone info for Bellaire.

Planting Calendar for Nierembergia

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

Nierembergia require warm weather which tells us that you really should wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant nierembergia in Bellaire 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 couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Bellaire. In the coldest months of winter you can expect an average low temperature of 20°F.

Always keep in mind that USDA zone info for Bellaire 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 Bellaire you get a frost after February 15 so make sure that you are prepared to protect your nierembergia if you have a late frost.

USDA Zone Info for Bellaire

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 Bellaire

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