Years ago a co-worker planted orange and grapefruit trees from seeds obtained from fruit she bought at the store. I inherited these trees (planted in the same pot) and have been growing them for about 14 years? The main tree is about 5 to 6 feet tall and adorned with 1 to 1-1/4" long thorns. The smaller one is only about 3' tall with small 1/4" thorns. The trees are beautiful and I like them as they are. However I'm curious if they will ever produce fruit.

Like I said, they are container grown (upstate NY). In the summer they reside outside in full sun. Winter they are in the house. Winter light is indirect sun light (no grow lamps). I do not know what type of orange or grapefruit they were. Late summer the trees tend to put on new growth. Would it help if I provided additional lights (grow lamps) in the winter months?

Thanks in advance

Tom