Hibiscus leaf is used as natural conditioner & anti-dandruff agent, collect the fresh leaves of hibiscus, paste them and apply it to your hair 2hrs before you wash your hair.
Hibiscus flower helps in thickening, growing, and darkening the hair, collect the hibiscus flowers, seperate the petals, dry them in sun untill they become powder, make fine powder from dried petals and add it your hair oil.

Yes, use of hibiscuss is an wonderfull way of hair conditioning, many herbal powders ans herbal medicines uses hibiscuss for hair problems, i use to dry hibiscuss leaves and the few herbal stuffs and grind it to make a perfect hair conditioner with zero side effects.

Yes, Hibiscus is a excellent plant that help to solve most of the hair problems.
As you said, dry hibiscus leaves can be used, but for your information, Not only leaves, the flowers of hibiscus can also be dried and grind, even the stem is useful for some hair applications..

There are sooo many ingredients out there. I still have a lot to learn! Thanks for the info!! This site is teaching me a lot..

great! i will try that one .. i prefer herbal this days..