I always repot upon arrival, unless the plant is in bloom and is a short bloomer. Then it's not worth risking the blooms - I'll wait till it finishes.

Many plants you'll buy aren't potted in good media, and unfortunately, many have unhealthy roots. It's best to know what you're facing right up front.

I never pay attention to their growth cycle when repotting. I care much more about their survival and their needs. If the plant is a long bloomer, like a Phal and a Paph, I have to weigh whether the repotting and risk of blasting the blooms because of the shock is worth it. If it's a short bloomer, like a Catt, I'll let it flower before I repot. If I'm worried the potting mix might not be good, and it's likely to bloom for a few months (Paph or Phal), I'll repot and risk the flowers not surviving. In months, an improperly potted orchid will die.

Hope this makes sense! I'm multi-tasking and tired! I think I'm done for the night!

McJ