Hi Terri, Those are really lovely blooms!
Your first photo does look to be
Roses of Sharon (Hibiscus syriacus) but the second two look more like
Tropical Hibiscuses (Hibiscus rosa-sinensis) to me and I'm amazed if they survive your zone 6 winters! I've had Hibiscus get real leggy if they are not kept pruned. I'm not sure why you aren't getting as many blooms as usual but hopefully someone from your growing zone will pop in with some advice.
