When Do I Fertilize My Blood Orange Tree

Question

Several branches have no blooms only leaves are they considered suckers?

Answer 1

You should fertilize during its active growth period and less during dormancy. These two articles will help
https://www.gardeningknowhow.com/edible/fruits/oranges/blood-orange-tree-care.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm

If the branches are coming out of the base of the tree, under the graft, or from the roots, they are suckers and should be removed.