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Top Questions About Cosmos Flowers

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Questions About Cosmos Flowers

  • Answered by
    Downtoearthdigs on
    May 21, 2015
    A.

    I also start Cosmos from seed. I personally just allow them to grow and bloom without any pinching or cutting back.

    I do dead head the spent blossoms though, as this will insure a healthy plant and more blossoms.
    Here is a link to growing and caring for your Cosmos.
    Happy Gardening.

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm

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  • Answered by
    Downtoearthdigs on
    June 8, 2015
    A.

    Here is a link to help you.

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos-in-pots.htm

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  • Answered by
    Downtoearthdigs on
    September 3, 2015
    A.

    Difficult to identify the insects specifically, but treat the plants with Neem OIl.

    Neem Oil works as both an insecticide and fungicide and is safe for people, pets and bees.
    Treat weekly until the infestation is under control.

    Here are a few links with more information.

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm
    https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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  • Answered by
    Downtoearthdigs on
    September 8, 2015
    A.

    You should sow the seeds in spring.
    You can start the seeds indoors in March for an earlier start to the plants.

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm

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  • Answered by
    shelley on
    September 30, 2015
    Certified Expert
    A.

    The closest match I could find was Cosmos peucedanifolius.

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  • Answered by
    Downtoearthdigs on
    October 13, 2015
    A.

    It is not unusual to get very tall Cosmos, they can reach 6 to 8 feet, so if they are quite happy and have a nice long growing season, 13 feet seems doable.

    Perhaps you want to save the seeds of your tallest plants to grow them again.

    I grow Cosmos in my garden and I do find that the first year they stay smaller and with each year of self seeding they get taller.

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm

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  • Answered by
    kh0001 on
    July 31, 2016
    A.

    Cosmos plants take a while before blooming, so depending on when you started them, they simply may not have reached maturity yet. Too much nitrogen in the fertilizer is also a common reason.

    This article may help you determine the reason your Cosmos plants aren't blooming:

    https://www.gardeningknowhow.com/ornamental/flowers/cosmos/cosmos-not-blooming.htm

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