Calamundin Tree In Florida Has Produced Calamundine And Full Size Oranges On The Same Tree At The Same Time Why?
We have a calamundi tree at our villa in Florida in previous years it has just produced calamundi which make very good marmalade but this year it is half calumundi and half normal size oranges.
Certified GKH Gardening Expert
It sounds like a shoot from the original rootstock (Which will almost never be the same as the top graft) has grow out and fruited!
As long as it is not affecting the health of the Calamondin, then it will be ok to leave it. If you start to notice it taking over the tree, then you may want to cut that branch out at the base.
Here is an article that will give you more information on trees reverting back to rootstock: https://www.gardeningknowhow.com/ornamental/trees/tgen/can-grafted-trees-revert-to-their-root-stock.htm