Types of summer annuals that hold up to Texas heat

Q: I have petunias planted in my beds and they look great. Can I leave them for the summer, or do I have to replace them with a summer plant? A: The Texas Superstar site says that most petunias do not hold up to our summer heat and humidity. However, a Texan (Greg Grant) developed the Laura Bush petunia which is able to stand our summers. It is a trailing petunia. Later, two more trailers, Tidal Wave Silver and Tidal Wave Cherry, were introduced. I asked at my local nursery as I bought my periwinkles whether he recommended leaving in... Article Link