my braided hibiscus tree was blooming beautiful – one flower a day, but sometimes two and even three. That was on May 10th.

Question

now May 30th there are no flowers and anything that even looks like it might be a flower opens, but is totally empty. What happened?
KimGr

Answer 1

Hibiscus are heavy feeders and need fertilizer to keep putting out flowers.
These links will help you.

https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm