One of the first steps you take when you are estimating your gardening schedule is find your 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 South Houston you can figure out when it's possible to plant twinspur by checking out the USDA zone info.

Planting Calendar for Twinspur

Frost tolerance for twinspur:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Twinspur tend to make it in mild cold which tells us that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant twinspur in South Houston is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant twinspur and expect a good harvest is probably October. If you wait any later than that and your twinspur may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your twinspur indoors.

Last Frost Date

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

Since the USDA zone info for South Houston is not always accurate the actual date of last frost changes from year to year. Since half of the time in South Houston it frosts late in the year after February 15 be ready to cover your twinspur 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.