Answer: Hibiscus, though evergreen, regularly drop the oldest leaves which turn yellow before they fall. If the yellowing is on the oldest, lowest leaves, toward the bottom and inside of the shrub, it's probably normal leaf drop. If new leaves are also yellowing, it can indicate stress from being indoors, receiving a chill during transportation to your home, not getting enough light, or even transplant stress. The best thing to do for your plant at this point is to continue watering it as you are doing now and just wait for new growth. When it begins growing again, which indicates the roots have re-established themselves, you can prune it back to encourage healthy new growth towards the center of the plant. With patience you can help your hibicus grow thick and lush and have lots of new flowers. Best wishes with your plant!
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