We do have three dwarf citrus potted up: a clementine, a Meyers Improved
lemon, and a Kieffer lime. We have had these for a couple of years now, and
bring them inside during the winter months. These are grafted on
proprietary dwarfing rootstocks, and we bought them as whips from Northwind
Growers in California. All have bloomed, while only the lime has set fruit.
The fruit fell off shortly afterwards, probably just as well given the
small size of the tree.
We have had to spray for scaly bugs a number of times.
Maintaining the proper level of soil moisture has been an ongoing problem,
in part because we started the plants out in fairly large pots. Rainy
weather would overwater the plants at first.
Overall, I find that they are rather fussy as houseplants go, but the
foliage and flowers are attractive, and I'm hoping for fruit set one of
these days. The trees readily go into a sort of state of shock when their
cultural needs are not met, and then they drop leaves and lose vigor. In
most cases they seem to come out of this.