One of the best tools that you have as gardeners to help us estimate 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.

By reviewing the USDA zone info for South Houston it's a good idea to determine when it's a good idea to plant basil.

Planting Calendar for Basil

Frost tolerance for basil:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You should not plant basil until after the last frost because they require warm weather.

The earliest that you can plant basil in South Houston 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 basil and expect a good harvest is probably September. You probably don't want to wait any later than that or else your basil may not have a chance to fully mature. If you are starting your basil indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is February 15 in South Houston. You should expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for South Houston is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in South Houston it frosts late in the year after February 15 so make sure that you are prepared to cover your basil in the event of a surprise late frost.

USDA Zone Info for South Houston

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 South Houston

You may be interested in your other planting guides for South Houston.