One of my hibiscus has stopped blooming and I don't have a clue why. It looked a little rough after wintering in the garage but has put back all of it's lost foliage and gained a good 1' or more in height since moving back outside in the spring. It bloomed for a while but now has shown no signs of a bloom in over a month. I have another that continues to put out multiple blooms so I don't think the SC heat has anything to do with it. Any ideas?