I just moved into a new house where the landscapers had plunked some azaleas down in the (very clay-y) soil. I want to pot them instead, but read that they have extensive, shallow roots. Will azaleas be happy in large patio pots?

Since I didn't plant the azaleas originally, I have no idea what kind they are. I guess I'll try the pots until they get a little bigger, and then decide if they need transplanting to a larger area.