A. The dwarf or miniature citrus trees are best suited for containers. The varieties that you might consider are: Orange-Calamonden, Thomasville, Clusterquat; Kumquat-Nagami, Meiwa; Lime-Limequat, Rangpur; Lemon-Meyer.
No matter which variety you choose, growing citrus will take some effort. Citrus plants need high humidity and good light conditions if grown as house plants. They will have attractive foliage, pleasantly scented flowers, and if carefully grown, will have brightly colored fruit. If grown outdoors, even though they like full sun, given them partial shade to reduce growth. This will also help in their acclimation when you move them indoors, if in poor light for too long. In February, cut back the entire top by a third, which will induce more branching and bushy-ness.
Citrus must be planted in well-drained soil. Do not allow citrus to dry out as this will cause leaf drop. As the fruit develops the plant will need additional fertilizer and water, since the ripening fruit puts stress on the plant.
For more information on growing citrus in containers, refer to the Extension Service's brochure on Home Citrus Production in Galveston County (publication #GC102).