My family has had a large potted orange tree for 60+ years, and they have never seen it flower. Now that it's in my care, and I am more equipped to care for the plant, I am wondering if the reason for it not flowering is because it's so old. I gave it its first repotting in several years in the spring, and it is a full on bonsai in a 30 gallon pot. Container citrus seems to flower no problem, so I still suspect the plant is just too old to flower.
If my goal is to get oranges, would I be better off using my propagations from the mother plant as root stock and grafting some known varieties? I don't know the variety of the plant, I assume it was seed grown and just stuck around all these years as a beloved houseplant. But I don't have a lot of experience with citrus so I am not sure.