Are there 3 major kinds of Hibiscus?
I have been planting alot of Hibiscus here 'cos they do so well and all. I notice some labels read "tropical", others "hardy" and still others "rosa-sinensis" ( I may have mispelled that). I even have Rose of Sharon (Althea) that had labels reading "rosa-sinensis". I have some Hibiscus as big as the house and some that are still shrubs, though obviously healthy. Which are the ones that get so big?