Hibiscus questions - Ask Extension
I have 6 , normally, very large hibiscus plants. For 9 of the 10 years they have been large 4' x4'. This year tgey are barely 2' by 2'. And the plants...
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Hibiscus questions #879159
Asked July 28, 2024, 9:02 PM EDT
I have 6 , normally, very large hibiscus plants. For 9 of the 10 years they have been large 4' x4'. This year tgey are barely 2' by 2'. And the plants themselves don't look right. The flower petals are also very small. Leaves are curled and feel hard, not normal/supple.
Some of the leaves have holes, but there is no obvious pest problem. In past years we have set the Sprinkler system and let them go, no fertilizer or other interventions and we got beautiful bushes.
Iam seeking ideas as to what might be the cause. 1. Too hot when the first started growing? 2. Some pest? 3. Too much or too little water 4. Possible pesticide? I have a service that comes to spray the weeds that is new this year. Any ideas would be greatly appreciated.
Adams County Colorado
Expert Response
Erika,
That growth looks consistent with either feeding injury from an eriophyid mite, or herbicide damage. Do you know if anything was used to prevent weeds from growing in the surrounding rock? You could bring a sample in, although do be aware that Wednesday - Friday this week the county fair may prevent easy access to our office.
That growth looks consistent with either feeding injury from an eriophyid mite, or herbicide damage. Do you know if anything was used to prevent weeds from growing in the surrounding rock? You could bring a sample in, although do be aware that Wednesday - Friday this week the county fair may prevent easy access to our office.
Thank you for getting back to me. I am guessing herbicide. If we quit herbicide and fertilize, assuming thus year us a loss...they stay the way they are, would you expect them to be back to normal next year? Or are they a total loss?
Would it be worth it to treat for the mite?
Erika
I wouldn't give up hope, yes, make sure they get good water and light fertilizer. If you suspect herbicide then I wouldn't treat for mites, plus mites don't typically impact a plant every year from my understanding. Be sure to know what herbicides are being used and how to use them safely.
