Hubby and I stopped at Wupatki ruins yesterday afternoon. They have a demonstration garden there and I read with interest how they water it. They use a drip irrigation system and their sunflowers, I noticed, had much thicker stems than mine at home, which were so spindly that they bent over. I'm going to have to think about that when I replant them next month. Here is a picture of the garden at Wupatki.