Someone closer to where you live might know different, but I would say early June.
I'm much farther south of you and my Kopper King hasn't woke up yet.
Barb

I live in zone 4 and I haven't noticed any new growth on mine either. But I understand they may not show any signs until June like Barb mentioned. Bonnie

HI! I'm in NJ and mine and my mom's both look the same. I think the new growth should start in early June, as I can remember from last season.

I'm outside of Detroit and mine don't show any signs of life until June.

I'm south of Detroit and mine don't start sending shoots out till summer...

No action on my hibiscus either, and I am watching it anxiously, as I planted it in the late summer last year.

I live in Southern Maryland. I planted two last fall. One has finally started to grow. I didn't prune them last year and the stems look dead, but new growth on one popped up out of the ground last week. A lot of new stems, each now about an inch or so high. The other one hasn't shown any sign of life, but I dug around the roots this last weekend and they are alive, so I assume that it might be a different type. The one sprouting is white, the other red, if that makes a difference.

the green will start at the very base of the "dead looking" stick, and if you're really impatient you can gently brush away about 1/4" of soil and peek, but i don't encourage it. be patient, you still have a few weeks!!

I received a bare root Rose of Sharon in tree form over two months ago and it still seems to be dormant. Reading these posts are encouraging cause I've been thinking that it might be dead. I can't wait to see the first sign of green!

I live in southern Ontario and most my perinial hibiscus have pushed up shoots some are 4" high but I have 2-3 that still have to come through, Its a waiting game. All the seeds I planted 10 days ago are also through.I have been growing Hibiscus all winter under lights and now have over 200 healthy plants,for swop, exchange or sell.
If anyone in the Chatham, Wallaceburg Sarnia area would be interested please email me at traps72@sympatico.ca

Mine looked dead too until yesterday:)3 little green leaves sticking out of it.

As my name implies, I know very little about the most beautiful flower I've ever seen. I have 5 plants 2 of which I brought back from the dead, one of which is blooming beautiful red flowers. I live in Mississippi and the others are blooming nicely also. What's the best fertilizer to use? One of my plants seems to produce just leaves, what do I do to jump start the blooms?

Mine has FINALLY sprouted today! The 2 tiny little sprouts aren't much, but at least I know I haven't killed it (yet). I live in Northcentral Indiana, if that helps any others in zone 5.

I have three plants, and little sprouts on only one at this time. I'm north of Detroit in Zone 5.

I am south of Port Huron and I have eight perennial hibiscus plants that are about two feet tall and leafing out nicely--earlier than last year because the weather has been warmer and they are in direct sun. They are 2nd year plants. Somebody told me to use Miracle Gro for tomatoes for more buds/blooms.

I got two seedlings of Rose of Sharon last year. They also still look dead, but the sticks that are left after winter, 2 inches or so, are still green. I removed one of them from the place I had it, since it looked so bad, and transplanted it to a pot.

Now I see new root growth. My problem/question is; it is a seedling, can it sprout from the ground? I think it look like there are no nodes left on the stick that leafes can grow from...What are the chances that my ROS`es are still alive??