I think your syrup is fine. Feed them as long as they want it. They will stop when they no longer need it. Bees do not like honeysuckle but love blackberrys.
Cool. That is of course what I was hoping to hear.
I didn't know bees don't like honeysuckle. I guess with the deep bell shaped flowers they are probably pollinated by moths, butterflies, and humming birds.
Too bad - there are zillions of them right now.