Hibiscus problem. Might have a disease?
I bought this hibiscus last year on clearance. It didn't have many leaves and also they were smaller than the usual. I've tried nursing it back but it still doesn't put out that many leaves ever since I got it. But it does put out lots of flowers.
Here's a picture of it. It occasionally get this yellowing on its leaves. I don't see any bugs at all on the plant. I've tried fertilizing it, watering it less, or watering it more, etc. Nothing seem to work.
I have a similar hibiscus planted near it and it's doing quite well. And its leaves are much bigger.
what could the problem be?