Not 100% sure if roselle is the same as hibiscus in this context, but roselle is one of my favourite herbal teas. I used to be able to buy a generous bag of dried blossoms at the grocers for very little, but they no longer carry it and I can't find them anywhere else. I've grown it as well, but I'd need to have way more space to grow it for regular tea drinking. The plants were on the large side, 3 or 4 feet and usually did well, except for the last year I grew them, and I got no seed crop from them

. Such a wonderful, tart tasting flavour.
I've learned since that the roselle blossoms are using in all kinds of desserts and sweet drinks. I think I'd enjoy those.