What can I do to correct the yellow leaves with black spots on my hibiscus plant?
What Can I Do to Correct Yellow Leaves With Black Spots on My Hibiscus
Your hibiscus probably has a fungus called black spot. It is fairly common and affects other plants, especially roses. This link is to an article with information about black spot: https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm
yellowing leaves on hibiscus can occur when the plant gets too dry. Leaf age can sometimes cause yellowing.