Re: Now I have to worry about swarming?
most methods of swarm prevention involve adding drawn comb to expand the cavity size and keep the bees from outgrowing their space.
that's hard to do in the second year.
at some point, adding more foundation frames doesn't work, but introducing some foundationless frames might.
the other thing you could consider is making a cut down split. this is like an artificial swarm whereby you take the queen, a couple frames of brood, and a frame of stores and start a nuc. the timing on this is important, and it should be done just prior to your main flow which is when swarming is at it's peak.
i learned about this on michael bush's website:
if you haven't already, i recommend checking it out.
just in case, you might want to set out a swarm trap or two.
journaling the growth of a treatment free apiary started in 2010. 20+/- hives