Blood orange tree
I live in southwest Mississippi, and have a blood orange tree, it has produced fruit the size of a lemon or just little bigger, but it is not edible no red when cut open is this normal or what could I do too help them ripen the tree is over 7\' tall.
Oranges typically take 12 months to ripen on the tree. Perhaps they just need more time.
If the fruits have already been maturing 12 months, this could be a disease or perhaps a grafting issue. If there was a disease present, you would see other symptoms, like discoloration or mold on the surface of the fruits. If it is a grafted tree that produced good blood orange fruit previously, the rootstock could have taken over and started producing a different variety of fruit.