pdshop,
Can't see why not. I cut off dead head and the stem w/leaves to keep them clean and blooming. Try cutting off 1 or 2 first to see what happens. Last yr. I had wire worms eating tubers and I dug them up while they were in bloom to find out what was killing them. I treated them w/ Triazicide concentrate,cut all the plants down by 1/2 and they came back. Dug them up and over wintered them in my cellar, this yr. they are doing great. Lots of blooms.
Good luck
Karen