The USDA Zone info is a great tool for gardeners to help us determine 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 South Houston you can determine when you can plant swan river daisy by checking out the USDA zone info.

Planting Calendar for Swan River Daisy

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

It's not a good idea to plant swan river daisy until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in South Houston. In the coldest months of winter you should expect an average low temperature of 20°F.

Keep in mind that USDA zone info for South Houston is just an average and the actual date of last frost will vary from year to year. Half of the time in South Houston last frost occurs after February 15 so make sure that you are prepared to protect your swan river daisy if you have one of those late frosts.

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.