See how the cucumber tendrils wrap around the fencing? The pea tendrils do the same thing. The challenge, of course, is to constantly adjust the plants so that the tendrils clench on to what you want, and not onto other plants, strangling the leaves and potentially killing other plants.
In my case, the tendrils of the cucumbers and peas got into a wrangle. I don't know how else to describe it, but co-strangulation.
The peas came out of the garden today. Honestly, I think this is the last year I'll grow peas. When I decided to plant them, I thought the young leaves would be a lovely addition to my spring mesclun mix. As the vines matured, I would have the snap peas. The leaves (tendrils) were too tough and the most peas I was able to harvest in a 3 day period fit into the palm of my hand.