I have uploaded some pictures and I have some other questions as well. I dont know what type of lemon tree this is, my wife got it from florida, it was about 5in high, I also would like to know how high it will grow (can I stunt it so that it wont get higher than about six ft because its indoor for the winter), how do I trim it and how long will it wait to bear fruit(if ever). Thanks for your help everyone. Also it is about 3 yrs old. Oh and does that double trunk help in the bearing of fruit?
If it has thorns like mine, it might be Meyer lemon. Not sure when they set fruit, maybe 3 yrs and can grow from 6"-10" but they can be pruned back to just above a set of leaves as you shape it the way you like. Mine almost died last year from being too hot and low humidity in my house straight from a greenhouse, but now it's coming back with new growth and has "some small fruit. It has a single stem and it had lots of lemons on it when I first bought it. Maybe the two stems on yours are for looks, for a more thicker bushier plant and double the fruit!
Nemol, it may be hard to tell what kind of lemon it is before you get some mature fruit. I did notice it has bronze leaves which is typical of new leaves on true lemons like Lisbon and Eureka, I do not know if Meyer lemons have bronze leaves. Having your tree in a container will limit growth and hopefully it is on a dwarfing rootstock. You can do a bark inversion to limit growth, but that would be difficult with the two trunks together. If the tree was grown from seed (not typical for commercial nurseries) that may explain the two trunks as seeds are often polyembryonic and may produce multilple trees from one seed. That also may mean it could take 7-8 years to flower and fruit and pruning it could prevent it from ever reaching the required leaf count for flowering. Skeet