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Top Questions About Black Eyed Susans

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Questions About Black Eyed Susans

  • Answered by
    Alisma on
    August 26, 2016
    Certified Expert
    A.

    The sawdust-like substance could indicate that a critter was gnawing on the stems. This could have also led to the rot you see.

    Just in case it is a disease, you should remove the affected plant, including the root and any fallen leaves, and dispose of it in a tied garbage bag.

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  • Answered by
    Downtoearthdigs on
    September 7, 2016
    A.

    Yes, you can cut the plant back further. I generally leave a few plants tall for some winter interest, but most of the plants I cut down to about 4 to 6 inches above the ground.

    https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm

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  • Answered by
    Alisma on
    September 18, 2016
    Certified Expert
    A.

    This could be a pollination problem. When there are flowers but no seed production, there may not be enough bees and other pollinators visiting your flowerbeds:

    https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm

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  • Answered by
    Alisma on
    November 3, 2016
    Certified Expert
    A.

    It sounds like you have a black eyed Susan vine, since it is growing on a trellis:

    https://www.gardeningknowhow.com/ornamental/vines/black-eyed-susan-vine/black-eyed-susan-vine-care.htm

    This plant is not winter hardy at all, so you will need to bring the plant indoors for the winter. If this is not possible, you can take one or a few cuttings from the vine and grow them indoors, as described in the article.

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  • Answered by
    Downtoearthdigs on
    April 3, 2017
    A.

    You should not need to pinch back the seedlings.

    Dead heading the flowers when they are spent will help encourage more flowers and a sturdier more compact plant.

    https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm

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  • Answered by
    Downtoearthdigs on
    May 29, 2017
    A.

    You may damage the tender vines on the plant if you try to remove the existing trellis.
    I would leave it in place.

    https://www.gardeningknowhow.com/ornamental/vines/black-eyed-susan-vine/growing-black-eyed-susan-vines.htm

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  • Answered by
    Downtoearthdigs on
    May 31, 2017
    A.

    Black Eyed Susan's bloom mid summer to early fall.

    These plants can flower through Sept and longer.

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