Rajun Gardener, if I take the tree outdoors in the winter, it will freeze to death immediately. Perhaps during a milder weather I can let it stand on the balcony, but not in lower than 0 degrees Celsius.
I do not prune the tree, but it has dropped some of its leaves and some of the branches have dies during the years.. so that may explain the slow process.
Some folks have succesfully raised a citrus tree indoors and have it bloom within three years ..
I want to see that on my plant too!