I pretty much do what Sharon Rose does. I also live in Texas, Burleson. I grow mine in large pots most of them being 11 gallons or around that size. I recently made a new daylily bed with black plastic under and gravel on top. Also because I'm old now, I put in sprinklers on the corners of the bed. It was 111 degrees here yesterday ugghh. Here is a picture of my new beds with sprinklers on the corners, it is 20 foot by 20 foot. I get some shade early morning.
Dot