I was wondering if anyone knew anthing about sunflowers. I am growing my first patch of them ever and they have been going along fine until about 2 weeks ago. The bottom leaves started to look a bit crispy on the egdes and I figured it was from the sun because that week it was around 99/100 degrees. But now, the leaves are turning black and some have yellowed leaves with black streaky spots. On about 50% of my plants all the lower leaves have blackened and shriveled off. The tops of all of them (they dont have flowers yet) are very green and healthy. I have looked through my books and talked with some people I know and I cant figure out what to do for them. I am a novice gardener anyways. Any advice is appreciated.