One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

In Tomball you can determine when it's a good idea to plant trachelium by looking at the USDA zone info.

Planting Calendar for Trachelium

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

You should not plant trachelium until after all chance of frost has passed because they require warm weather.

The earliest that you can plant trachelium in Tomball 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 trachelium and expect a good harvest is probably September. You probably don't want to wait any later than that or else your trachelium may not have a chance to really do well. You can get started a little bit earlier by starting your trachelium indoors.

Last Frost Date

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

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Tomball and it is different every year. Half of the time in Tomball last frost occurs after February 15 so always be ready to protect your trachelium if you have one of those late frosts.

USDA Zone Info for Tomball

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 Tomball

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