I usually go by the rule that if the leaf plucks right away from it's base with just the lightest tug, then it's okay to let it go. If you have to pull so hard that the branch pulls along, then leave it be.
Slothrop Reviewed by Slothrop on . Yellow purple leaves As we all know, pruning off fan leaves is dumb. They are the engines for photosynthesis. But what about big yellow purple tipped leaves that look like they're dying. They're shading a lot of good green leaves. Should they go? Rating: 5