By Jenlewis
Shropshire,
United Kingdom 
Hi all, I have a Variegated Norway Maple in my front garden that has started to revert to plain green leaves on a couple of branches. I was advised to cut these off straight away to slow down the process of the whole tree reverting back by a bloke who had come over to give me a quote on another job. Knowing that this tree should be pruned in winter months when it is dormant I was wondering what all your thoughts are on this advice. Should I prune these branches now or mark the effected branches with something so I will know which ones they are, then prune them this winter? Would be grateful for any advice and thought on this. Thanks Jen
2 Aug, 2017
Answers
Thanks Jimmytheone. I had read that this was very common and in the town near me there are a few of them that have turned back to green all but one branch so I know that by chopping them out I will only slow it down. Problem is OH has said that if goes all green he doesn't want it left in so would be yet another tree to be removed since moving in here and I wanted to put it off. Thanks again Jen
2 Aug, 2017
I agree with Jimmy. Prune the offending leaves now to slow the conversion process. As the tree matures this may become more difficult.
2 Aug, 2017
Whilst the advice is not to prune Acers in summer, you can actually do this sort of thing from mid to late July onwards - they tend not to bleed past that date.
2 Aug, 2017
Thank you all. Will do it once we have a dry day as tree is already fairly big and will need to get a ladder out to reach them and don't really fancy going up a ladder in pouring rain :-).
2 Aug, 2017
Probably Acer Drummondii and a common problem. You can prune the reverted branches now but if it continues as the tree gets bigger, I'm afraid I would be inclined to leave it.
2 Aug, 2017