Blood orange trees
I am wondering if a blood orange tree can grow form its cuttings? Or does it need to be graphed? Should I start with seeds?
Commercially, orange trees are almost always grown on grafted rootstocks because oranges are very susceptible to certain diseases, especially root rot caused by Phytophthora species. You can certainly grow a tree from a cutting as long as you are willing to take this risk. A tree grown from a cutting will produce the same type of fruit as the parent tree.
Growing a tree from your blood orange's seeds is also possible, but the offspring might have different characteristics from the parent tree (for example the frut may be bitter), and it will also take about 3-5 years longer to produce fruit.