The USDA Zone info is a great tool for gardeners to help us figure out 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.

In Richardson you can determine when it's the best time to plant schizanthus by checking out the USDA zone info.

Planting Calendar for Schizanthus

Frost tolerance for schizanthus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant schizanthus until after the last frost because they do not do well in cold weather.

The earliest that you can plant schizanthus in Richardson 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 schizanthus and expect a good harvest is probably August. If you wait any later than that and your schizanthus may not have a chance to fully mature. You can get started a little bit earlier by starting your schizanthus indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Richardson. You can expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Richardson is just an average the actual date of last frost is different every year. Since half of the time in Richardson there is a last frost after March 15 be ready to protect your schizanthus in the event of one of those late frosts.

USDA Zone Info for Richardson

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 Richardson

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