fallfograin:
I would let your plant get established. It needs to store sugars in the undergoung tubers for next years growth.
Mine would start blooming in Febuary,prune during the growing season so it recovers quickly. I am in alkaline
clay here and my plants always benefited from a fir mulch
(mulch from Christmas trees)for a nice dark green foliage.
If your plants keep falling over you may want to remove the
blooms and foliage at the node just below the bloom. So it
pushes out some roots to stablize itself.
Art

I agree that you should wait a bit for the plant to get established before heavy pruning. When cooler weather arrives -- jan./Feb... then prune it.