Ask a Question forum: What is going on with my hibiscus?

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South Carolina
HJW_MB
Jul 12, 2017 8:15 AM CST
Originally thought I had spider mites and treated for that. Then found fungus gnats and treated for that. The plant now has a black fungus growing on parts of the stems and I find small red "spores" on the stems (never on the leaves) that I can easily wipe off with my fingers. (If you enlarge the first photo you can see 3 of them) I have been spraying the fungus with a hydrogen peroxide and water solution. The plant seems healthy otherwise - shows new leaf growth and continues to bloom (see photo 2). Why the fungus? And what are these red spores?

Thumb of 2017-07-12/HJW_MB/311c2e


Thumb of 2017-07-12/HJW_MB/eed345

Name: Jared Nicholes
Nampa, Idaho
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jnicholes
Jul 12, 2017 10:19 AM CST
Hello There.

First off, welcome to the forum.

Second off, from what I have just researched on the internet about this Hibiscus problem, It sounds like a fungus disease called Cankers. Symptoms of Cankers are black spores that appear on dead tissue and red fruiting growth appears on the diseased bark.

If it is not controlled, it will kill the entire plant. However, there is a way to control it.

Remove the diseased tissue, and you should be okay.

I am not 100% sure if this is the problem, but it might be. Regardless of the problem, I and many others on this forum will do our best to help you out.

Jared
South Carolina
HJW_MB
Jul 13, 2017 8:16 AM CST
Thanks for your response Jared. I also thought it might be cankers, but when I look at pics of cankers, they don't quite look like what I have on my stems. The photos I've seen look like the red stuff is kind of embedded into the branch, on my plant the red stuff is on the branch but can easily be wiped off with my finger. Also, there is new growth and blooms taking place above the fungus on the stems! I am so confused! Will try your suggestion about cutting back any dead branches.
Name: Anne
Summerville, SC (Zone 8a)
Only dead fish go with the flow!
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Seed Starter Garden Ideas: Master Level Hibiscus Hybridizer Garden Sages Butterflies
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Xeramtheum
Jul 13, 2017 8:43 AM CST
Hi and again, welcome to NGA!

Definitely cut off any stems with the canker on it and sterilize your clippers with alcohol after each cut. Do not put the cut stems in a compost pile. Also it wouldn't hurt to spray your plants with a fungicide.
"The Universe speaks in many languages, but only one voice. It speaks in the language of hope; It speaks in the language of trust; It speaks in the language of strength, and the language of compassion. It is the language of the heart and the language of the soul. But always, it is the same voice. It is the voice of our ancestors, speaking through us, And the voice of our inheritors, waiting to be born. It is the small, still voice that says: We are one. No matter the blood; No matter the skin; No matter the world; No matter the star; We are one. No matter the pain; No matter the darkness; No matter the loss; No matter the fear; We are one. Here, gathered together in common cause. we agree to recognize this singular truth, and this singular rule: That we must be kind to one another, because each voice enriches us and ennobles us, and each voice lost diminishes us. We are the voice of the Universe, the soul of creation, the fire that will light the way to a better future. We are one."

G'Kar
South Carolina
HJW_MB
Jul 13, 2017 12:46 PM CST
Thanks! I will give that a try.
South Carolina
HJW_MB
Jul 14, 2017 11:24 AM CST
Cut off the stems ... plant is looking rather bare now! Smiling I have been using neem oil on a 7 day basis for mite control and fungicide for about 3 weeks now. Hopefully all this will work.
Name: Anne
Summerville, SC (Zone 8a)
Only dead fish go with the flow!
Plant and/or Seed Trader Birds Cat Lover Greenhouse Tropicals Bulbs
Seed Starter Garden Ideas: Master Level Hibiscus Hybridizer Garden Sages Butterflies
Image
Xeramtheum
Jul 14, 2017 11:53 AM CST
Sounds good, but it's not really good to be using an oil at the moment if you are in the Low Country as it will literally fry the plant. Also feed them. I use Carl Pool food for all of mine but plain old Miracle Grow will work too.

https://www.amazon.com/dp/B000FPL680/
"The Universe speaks in many languages, but only one voice. It speaks in the language of hope; It speaks in the language of trust; It speaks in the language of strength, and the language of compassion. It is the language of the heart and the language of the soul. But always, it is the same voice. It is the voice of our ancestors, speaking through us, And the voice of our inheritors, waiting to be born. It is the small, still voice that says: We are one. No matter the blood; No matter the skin; No matter the world; No matter the star; We are one. No matter the pain; No matter the darkness; No matter the loss; No matter the fear; We are one. Here, gathered together in common cause. we agree to recognize this singular truth, and this singular rule: That we must be kind to one another, because each voice enriches us and ennobles us, and each voice lost diminishes us. We are the voice of the Universe, the soul of creation, the fire that will light the way to a better future. We are one."

G'Kar
[Last edited by Xeramtheum - Jul 14, 2017 2:10 PM (+)]
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Name: Jared Nicholes
Nampa, Idaho
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jnicholes
Jul 14, 2017 1:14 PM CST
Hello.

Your plant may look bare now, but I am sure it will recover in time. I have seen plants survive some really hard things, like the time my potted banana plant died in shipping, and a week later, a new plant sprouted from the corm! It was amazing!

Jared
South Carolina
HJW_MB
Jul 16, 2017 7:11 AM CST
Fingers crossed!

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