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  • Answered by
    kathycakes on
    March 28, 2011
    A.

    I'm not sure what zone you are in, but anything lower than zone 8 I'm surprised made it at all over the winter (unless it's a hardy hibiscus). Hibiscus do not like over watering or too much room to grow (if planted in a container). Yellow leaves usually mean too much water, but conversely can also mean not enough. We know that's not your situation. Try cutting back on the watering (only when top 3-4 inches are dry), give it a chance to recover, and try again. Whatever you do, don't fertilize until it has almost fully recovered.

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  • Answered by
    Nikki on
    March 29, 2011
    Certified Expert
    A.

    It is likely aphids or scale. Here is information on both and how to get rid of them: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
    https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm

    We have found neem oil to be quite effective in treating both these pests and many others. It is organic and safe for use: this article has additional info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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  • Answered by
    Nikki on
    March 31, 2011
    Certified Expert
    A.

    It is powdery mildew. This article will have some suggestions for getting rid of it organically:
    https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm

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  • Answered by
    chill01xx on
    March 31, 2011
    A.

    The plant grows and blooms well at 18-20 degrees Celsius. The temperature must not fall below 10 degrees Celsius in winter. Needs full light and can adapt gradually to full the sun. During the summer, the plant needs large amounts of water.

    Diseases and pests: Rust occurs in the form of blackish brown spots. Gray mold damage the buds and flowers. Avoid excess moisture with a good ventilation of the plant.
    The plant is attacked by lice and red spider. Apply an insecticide treatment associated with an acaricide, plus a systematic fungicide Rubigan 0.01% every 10-14 days, for a minimum period of a month.

    Care: Trim the plants every spring, and shorten the ramifications. Water the plant whenever the soil in the pot dries. Fertilization is required at least two or three times a month. During winter, reduce watering to promote the sleep of the plant.

    you can find more info on plants care on w w w dot indoor-plants-care dot blogspot dot com

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  • Answered by
    Nikki on
    April 1, 2011
    Certified Expert
    A.

    The following article should be of some help to you:
    https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/tips-for-pruning-hibiscus-plants-when-to-prune-hibiscus.htm

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  • Answered by
    Nikki on
    April 2, 2011
    Certified Expert
    A.

    It probably has a bit of a nitrogen deficiency. This happens sometimes after heavy rains. Give it some nitrogen heavy fertilizer to help it.

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  • Answered by
    Nikki on
    April 3, 2011
    Certified Expert
    A.

    If the stems or trunk are still green, they can come back. This article will help you determine if they are green:
    https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm

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