Leaf Curl w/ Purple Edges?
 

Any ideas what's going on here? I have multiple varieties in the same raised bed and I'm not seeing this on any others... just this German Johnson. And just on this particular branch (which is now growing downward since it has escaped is cage). Thanks for any input.

That seems like an older leaf, if yes I wouldn't worry about it. Just some P deficiency most likely, when the plant was younger, they don't fully recover even after the conditions are good.

I'd probably just trim that branch off, let it focus its energy on the other branches that aren't draped on the ground. Or at a minimum I'd top that branch so it doesn't continue to get any longer
. It's only June that baby will be massive by end of season
.