I have a 10 year old lemon tree. I live in northern wisconsin so it is inside most of the time. What fertilizer do I use? 10-15-10? I have had no luck with any nurseries here as they don't carry citrus trees. This tree is 8 feet tall, will grow 2-3 feet in the summer when I get it outside. I must prune it every year to get it back inside. It is very healthy but has never bore fruit. Will fertilizing it help it to fruit?
