I have grown african violets successfully for years and the one thing I
have noticed is that after I bring them home from the store/garden
centre they take a long time to rebloom. I think it is because they are
forced in the first place. I water sparingly from the bottom and once a
month I use Shultz liquid fertilizer. I keep them in lots of light but
not direct sun. As suggested in another post they don't like big pots.
It seems they don't blossom until they become almost root bound but can
stay that way for years. Good Luck as the flowers are worth it.