My pole bean leaves have really started drying out and browning, especially at the top of my trellis. The leaves are almost like sandpaper and the little beans are spotted brown and dry also. Could it be their life-span is over? Or could it be too much sun? Too little water? Disease?

I live in the Dallas metroplex and we had an extremely wet Spring, but hot, dry, sunnny weather the last three weeks or so. Could they be missing nutrients? My soil is alkaline black clay under my raised bed. I'm sure their roots are in the native soil by now.

Thanks,

pete