Hardy hibiscus question??

I planted a bunch of Hibiscus coccineus (red texas star) last spring, I got about 18 or so that came up.. I live in zone 6b and it says there good to zone 6a.. Just wanted to know if anyone grows these.. Do they die off to the ground and start again every year like the Hibiscus moscheutos do?? The reason I'm asking is that Hubby cut them all about 6" from the ground.. I asked him to cut all the plants down but leave the hibiscus.. Guess he missed that part lol... I never got a flower, but i didn't plant them in full sun.. I would hate to have to start over, but if i do I have seeds ready to plant again..

It wouldn't hurt to mulch them with a foot or so of leaves if you have any. If the leaves won't stay put, place a tomato cage around the plant and fill it with the leaves.

I bet they come back for you three times as big next year! Definitely mulch, though.

ya i hope so.. I do have to move them as there just in my seed starting garden.. in about a 3' square but theres a bunch.. I hope at least one comes back.. I did i put leaves over them really good and there in the back where we get 0 wind, its always 10 degrees warmer back there then in the front all summer so i hoping that stays the same in the winter.. not sure as i dont spend much time outside in the cold months