Interesting watching your small citrus trees get going. You mention overwatering tendencies, I think it would be hard not to over trim...hard to have the patience to wait to see results. I have three citrus trees in my backyard - orange, grapefruit, and lemon. The lemon does the best. I think the other two would prefer more sun. We are a bit to far north for them. Our small back yard is fenced. When we get a cold snap, the branches above the fence line will get killed off. The fenced in yard holds some heat protecting the trees.