Why do the leaves of my Japanese Maples sometimes turn greenish?

Question

It's not just in the fall this happens. The new growth leaves still have that cranberry red color but the others gets a greenish tint to them. Why is that?

Answer 1

Sometimes the amount of sun reaching the leaves will affect color. Occasionally a tree/shrub like this will produce an all-green branch. All you can do is prune it off.

Answer 2

http://www.google.com/search?lr=&ie=UTF-8&oe=UTF-8&q=Japanese%20Maples
Knock yourself out