In response to Emery's comment in another thread: Butterfly variegation, this thread is being started to discuss reversion in variegated maples, for addition to the FAQ section (if we get some good replies). I don't grow many variegated maples, so I am by no means an expert on this subject, but I do grow a few. My rule of thumb on seeing a non-variegated shoot is to leave it to grow for the current season, and then to cut it off the following spring if it is still showing no variegation. How do others deal with this problem? Looking forward to hearing your opinions. Some Japanese maples are notoriously unstable and can have reversions that completely overtake the original tree in a few years if not dealt with, 'Ukigumo' is one well known example. It would be interesting if people could report which variegated maples are most unstable and prone to reversion, and which ones have vigorous branches that can be green one year and return to variegated the next.