Reading your article on when to prune the Hibiscus was a lot different then I was told. So your article
says to do it just as the plant begins to bud in the springtime. I was told to prune my plant in March when it was dormant. I pruned mine (zone 5) in March/early April and it looked like it was budding, then it stopped and now it looks dead. It seems I killed it, as it never bloomed this summer after years of beautiful blooms.
I saved seeds from it so I might try growing another one. So basically wait for the plant to start to blooming and then prune it back? This had beautiful flowers on it each year but grew to an out of control bush. I tried to tame it but looks like I killed it instead.