I have grown a Meyer lemon and a Moro blood orange for years in containers, just using Miracle Gro potting soil. In north Tx, they spend 4 months in my greenhouse, the other 8 mos outside. They started out in 2 gal pots, then went to five, 7 and this year will be going up to 15 gal pots (I'm waiting until they finish blooming and set fruit)but that's about as big as I can go, as they need to be able to fit in their winter quarters. They are heavy feeders, so they get plant food(Miracle Gro reg),iron and Superthrive when I water. In SoCal, where I'm from, they bloomed regularly, year after year- here in Tx, they seem to bloom heavily every other year. Here's a pic of my Meyer lemon in bloom taken about two weeks ago-the fragrance is great! Good luck with yours.
