Does my tree have suckers?
I have an orange tree that I bought from Sea World in Orlando,FL in May 2006. It came in a tall slender box and consisted of a four small branches sticking out of a small square plastic pot. The branches ranged from 2 inches tall to about 3 inches tall. That was nearly 7 years ago. Now the the tree is about 5 feet tall and 3 feet in circumference. I've been watering it regularly and it gets direct sunlight in the morning and evening and is shaded about half of the day. I've read online how to take care of orange trees and have tried to follow the advice. The tree is potted. Its soil is about a year old.. when I re-potted it I put a few inches of river rock on the bottom and used Miracle Grow Organic soil for garden plants and fruit trees. I fertilize my tree with miracle grow and citrus tree fertilizer.
I live in Brevard County Florida but I just moved here from South Carolina (I moved here in January 2012). When I lived in SC I always took the tree inside before first frost and didn't move it outside until after the last frost. It stayed outside in a sunny spot all summer... but now I'm planning on having it live on my porch all year around since i live in south-central Florida.
The tree has never bloomed or fruited for me but I've always thought that was because it was immature. Well, I was reading online that orange trees won't grow fruit if it has suckers. I have read that suckers are defined as branches that grow below the graft line. I've read many descriptions of the graft line but I cannot seem to find it. I'm afraid that my entire tree is one big sucker because it has thorns all over it and some are quite large.
If you guys could please help me and give me some advice it'd be much appreciated and my orange tree and I would be very grateful. Also, my orange tree just recently started having some white splotches on its leaves. I've bought some fungicide/miticide/insecticide that I got from a local nursery.
Here are some picture that should help you help me