Among the plants I have are two elderly (like me) valencia orange trees, about 60 years old. I fertilize them regularly, they are well mulched, and...Among the plants I have are two elderly (like me) valencia orange trees, about 60 years old. I fertilize them regularly, they are well mulched, and I water them frequently enough (I think). They are prodigious bearers but the fruit is small. I would like it better if they produced fewer and larger oranges. Any suggestions? Show more