It sounds like chlorosis, which is usually caused by
iron or magnesium deficiency or high pH (above 7.2) of the soil.

Thanks for the info, I "googled" it and came up with the same conclusion. Thanks again.

I had the same problem and I thought it was lack of Mg. So, I fed it with Epsom Salt, but it did not help. Then I researched further, and found that if the soil is somewhat alkaline, then Hibiscuses will not be able to absorb Iron and will develop chlorosis. However, Iron EDDHA Chelate can be absorbed by Hibiscus planted in alkaline soil. I then bought some from an online vendor and after one use, the leaves look much better (knock on wood!!!). Hopefully, after another treatment, it will be okay.

So, in conclusion, if Epsom Salt does not work, try Iron EDDHA Chelate.

Good luck.

Gardenlady,

Did you try the EDDHA Iron Chelate? I hope it helped.

Good luck.