Tropicals & Tender Perennials: novice seeking advice, 1 by michaelangelo

michaelangelo wrote:
I bought all three of the Begonias in the picture from the local nursery. All three were smaller (4" square pot when I got them)> As you can see, one has gone "blooming crazy" and the other two look pretty good too, although I'm not at all experienced with these types of Begonias. So I am looking for some heads up advce on how to keep them looking good, keep them healthy, and any thoughts on why the one exploded with flowers while the other two not so much. Maybe I used too much fertilizer on the one (I didn;t pay very good attention.)