Just how bald can I go?

[bearded bloke]

Some of the yellowing could be lack of nutrients in the grow bags,giving them a feed it might help them along a bit

[Penellype]

They look much better than mine, which really are growing wild. My trouble is that I won't chop back anything that looks like it might produce more fruit, and that has resulted in a serious jungle. I'd get a photo, but its a bit dark out there now.