Lacy looking hibusicus leaves.
I live in NE Ohio (Zone 4 or 5?) and planted 3 great hibiscus in the spring. (1 Blue River; 2 Red Flare) and the blooms are great (although not as large as I expected). However, the leaves are all lacy looking, as if a bug is eating them. Any ideas?
Here is a site that shows some diseases of hardy hibiscus.
This one talks about 'web blight'. See if this sounds like what you have.
You might also find this site helpful.
You may have a virus. I would take the precautions of good hygene in the garden. Any pruning that you do should include dipping your pruning shears in a solution of one part bleach to nine parts water after each cut.
If this doesn't help, you might want to consider taking a leaf to a good garden center in a sealed plastic bag for id.