Yes. They are.
lowes, homedepot, wallmart... depends on the area you live in and what they carry. This time of year you will not find them. Typically you find them starting in the spring early summer.
I found mine at a local nursery. They did not use pesticides either. Maybe try googling and looking for some in your area. Mine was only $15 and was a decent size. I’m using a stand to make it taller until it grows in.
I always buy at least 1 at the garden centers in the spring.
Yes, hibiscus flowers are ok for all the species I’ve kept, and heard of. There is hibiscus flower powder in most commercial gutlaoding formulas.
