Maple tree sprout

Question

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?

Answer 1

This phenomenon is called "rootstock revert". You can read more about this and how to treat it in the following article:

https://www.gardeningknowhow.com/ornamental/trees/tgen/can-grafted-trees-revert-to-their-root-stock.htm