Almost always. I rarely buy plants but when I do I try to select a candidate which looks as if it has sufficient stems to divide straight away.

I not only divide them, but like you said, dividing during blooming might be an issue for some plants, so I might even choose one that has the least amount of blooms or flowers. This is so that while it is re-establishing in the new soil or location, it can focus on that and not have to worry about flowers just yet.

The other thing is that I might go ahead and chop off a few leaves and blooms anyway, when I transplant, so if there were only plants that were blooming, I would still get it and do that during the transplant,.

Thanks! I'm going to divide the heck out of this plant.