Why are the leafs on my hibiscus turning yellow?!

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I have had hibiscus plants for years. This year has been the first time the leafs on one of the plants is turning yellow! I have fertilized them, and they get plenty of water, but I have NO idea whats up with the yellow leafs. The plant is still producing lots of gorgeous flowers, but for some reason the leafs are yellowing! Any ideas?!
  6 answers
  • Janet Pizaro Janet Pizaro on May 08, 2017
    It could be an insect infestation or a fungus.

  • VickiC VickiC on May 08, 2017
    Dont see any insects, I keep those pretty well at bay with spray. I dont know about fungus, as not all the leafs are affected. Plus, there are 3 other hibiscus within a 3 ft radius, so I think if it was a fungus, all the plants would have it?! Just this one plant has the yellow leafs. Its very strange!

  • Daylynn Daylynn on May 09, 2017
    Does the leaves have bumps on them? They almost look like warts?

  • Dana Baier Dana Baier on May 09, 2017
    Could be they are getting TOO much water. I have find that Hibiscus are pretty hardy & they have survived our very hot, drought plagued California summers for the last couple of years with very little watering.

  • Danielle Odin Danielle Odin on May 09, 2017
    When I lived in So Cal, there was a big hibiscus bush on the property and it started to die. Found that it had a fungus and that several hibiscus had the same thing in the neighborhood. They had to be cut down t the ground. I moved soon after and never followed up on what happened after. This was a good 25 years ago.

  • VickiC VickiC on May 10, 2017
    I'm fairly sure this isnt a fungus, the leafs are fine other than being yellow, and the flowers are gorgeous. When other flowers/plants get a fungus, the entire plant looks horrible and the leafs are nasty looking along with the flowers. I think what happened is it got over watered by mistake!!!