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Top Questions About Delphiniums

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Questions About Delphiniums

  • Answered by
    earthlady on
    June 2, 2011
    A.

    After your delphinium has finished blooming cut off the flower stocks. If it blooms early enough and you do that you may get a second bloom in late summer. In the fall trim the entire plant back to the soil. I live in a zone 3b & mine survive fine with snow cover from mother nature. You could put a mulch of dead leaves over top. It is important to prune it down in the fall preferably after the frosts have mostly killed the foilage. This procedure helps to prevent delphinium worm infestations.
    Hope this helps you out.
    Earthlady

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  • Answered by
    Heather on
    September 26, 2011
    Certified Expert
    A.

    With the camellias and rhododendrons, it could be seed pods or it could be buds forming for next year. They likely will not bloom again this year.

    As for the delphiniums, it is not surprising that this happened. When you cut them down, you dead headed them. A plant's main goal in life is to produce seeds. When you cut them down, the plant forced itself to bloom again to try to make more seeds. This article may be of interest to you:
    https://www.gardeningknowhow.com/ornamental/flowers/fgen/deadheading-flowers.htm

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  • Answered by
    Nikki on
    September 11, 2012
    Certified Expert
    A.

    These plants are not spring bloomers. They bloom in early summer and often again in late summer or early fall.

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  • Answered by
    AnnsGreeneHaus on
    March 21, 2013
    A.

    Delphiniums germinate from 5 days to 5 weeks. The best soil temperature for germination is 60-68*F. The common failures in germinating delphinium's seed are these. 1) Keeping the soil too wet. 2) Sowing the seed too deeply. Seeds should only be covered with approximately 1/8" of soil. 3) Trying to germinate old seed. Delphinium seed loses its vitality after one year. 4) Freeze the seed in the freezer for two days prior to seeding.

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  • Answered by
    AnnsGreeneHaus on
    August 8, 2013
    A.

    In ''the industry'' delphinium refers to the perennial, Delphinium elatum. This plant should remain the same color for it's life span. If delphinium are pollinated, and the seed germinate, growing to bloom, eventually, yes, you will have plants of the same color. If you cut the spent bloom spikes off before seed ripen and/or fall, your plant will not change color. Larkspur, Delphinium ajacis, is a biennial, meaning that you sow seed year one. The plants bloom year two, are pollinated, form and drop seed. That plant dies, the seed germinate and bloom year three. You generally let the seed drop for the next years flowers. Unless those plants are segregated, you will end up with the same color. (Hope this didn't confuse you too much.)

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  • Answered by
    Nikki on
    May 18, 2014
    Certified Expert
    A.

    You can remove old growth in fall after frost or before new growth begins in spring. This is entirely up to you.

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  • Answered by
    Downtoearthdigs on
    July 27, 2015
    A.

    This could be caused by watering issues, to much or to little.
    If the plants are to dry they may be dying down prematurely. If the ground is wet and excessive damp conditions it can cause root rot.
    I would trim away the dead material and treat the plants with Neem Oil. This acts as both an insecticide and fungicide. Stressed plants can invite both.
    Here are a few article for you.

    https://www.gardeningknowhow.com/ornamental/flowers/delphinium/delphinium-winter-care.htm
    https://www.gardeningknowhow.com/ornamental/flowers/delphinium/growing-delphinium-plants.htm
    https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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