I'm in McAllen, and I'm finding the flowers I used to grow in more northern places don't always like the intense heat of the summer, and it takes some trial and error to get the planting times right for them to make it to a full bloom without everything just absolutely wilting. And full sun doesn't always mean full sun down here either. But you can get some nice blooms if you plant in January, or even let some fall flowers, maybe planting in October, grow all "winter". I know my herbs do better if I plant them in October and let them grow into the spring, and I think the flowers do also. I have a few marigolds right now that are still surviving the heat. They won't last much longer, so I am enjoying them while I can! Celosias seem to do well, with some watering, even through early summer. This winter we had a native or volunteer sunflower of some kind grow probably 15 feet tall and branch out with flowers all over it. I haven't tried as many flowers as I'd like, but lately I've been spying on all the neighbors flower beds to find out what does well for others in my neighborhood. I see a lot of hybiscus, crepe myrtles, amaryllis, and sedums. Several of the more exotic things I haven't figured out the names for yet, but I'm learning! Oh, and there is one yard in my neighborhood with a lot of lilies in the shade, and also a wonderful row of roses in partial sun.
