Maple tree sprout
I have an Acer which has very fine leave that are red in colour and is a well established plant. However, to our amazement, a shoot has appeared from the main tree about 3 inches from the ground and has grown to the top of the tree, but it has a different leaf than the main tree. It is green and has a big maple leaf. Totally different to the other and it's very healthy. Is this the norm or is it rare?
This phenomenon is called "rootstock revert". You can read more about this and how to treat it in the following article: