Tomatoes doing great, sunflowers droping over.

My tomatoes are looking great. I planted 121 tomatoes. I mulched all my tomatoes this year with at least 6 layers of newspaper topped with grass clippings. It is a lot more work doing it this way but well worth it. It keeps the weeds down and the moisture in the ground.
Here are pictures of my plants that I took today.






My sunflowers all came up and look great, but I have lost most of them and they look like this.



Does anyone know what causes this to happen? At first I thought the squirrels chewing them off but now I think a worm is the problem. I don't know if I'll have any mature enough to blossom or not.
We have had a dry spell now for a while but last night it rained some so that should help.
I do have a few peppers on my plants now. and my beans are in blossom.
Hope your gardens are all doing great.