See the beauty of the orange hibiscus

hibuscus yellow red orange
You can expect to see a moderate amount of yellow leaves on your hibiscus when you take care of a hibiscus indoors over the winter. This is normal, and the plant is acting normally. If all the leaves have fallen off but the branches are still pliable, your hibiscus has just gone into full dormancy. At this time, you may want to place it in a cool dark place and allow it to stay dormant.