Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In San Antonio you can figure out when it's possible to plant flowering kale by checking out the USDA zone info.

Planting Calendar for Flowering Kale

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

You can plant flowering kale a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant flowering kale in San Antonio is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant flowering kale and expect a good harvest is probably September. You probably don't want to wait any later than that or else your flowering kale may not have a chance to fully mature. If you are starting your flowering kale indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In San Antonio the average date of last frost happens on March 15. You should expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for San Antonio is an average and the actual date of last frost is different every year. Since half of the time in San Antonio it frosts late in the year after March 15 be ready to protect your flowering kale in the event of a surprise late frost.

USDA Zone Info for San Antonio

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in San Antonio

You may be interested in your other planting guides for San Antonio.