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Planted at Mount Vernon

Planted at Mount Vernon Upper Garden

  • Upper Garden

  • Hardiness Zones

    3 3 4 4b 5 5b 6 6b 7 7b USDA basemap

    Average annual extreme minimum temperature 1976-2005

    map legend 3 3b 4a 4b 5a 5b 6a 6b 7a 7b

    This late blooming perennial adds height and colorful spires to the end of summer shade garden. It prefers afternoon shade in the southern garden, but will tolerate sun further north.

    Latin Name

    Aconitum napellus



    Also Known As

    Queen of All Poisons , Wolf's Bane , Aconite

    Type of Plant

    Perennials Perennials

    Bloom Season

    July - August


    Summer Summer


    Max height Max Height: 4'
    Max spread Max Spread: 1.5'


  • Flower Border

  • Sunlight Exposure

    Part Shade Part Shade
    Part Sun Part Sun
    Full Sun Full Sun


  • Deer
  • Rabbit

  • Toxicity

    Do not ingest Do not ingest
    Skin irritant Skin irritant
    Harmful to pets Harmful to pets


    Native Range

    Western and central Europe


    Lady Jean Skipwith enjoyed this purple flower in her Virginia garden in 1793.

    Other Details

    Pollinator Pollinator

    Bartlett Tree Expert Company has been working with Mount Vernon Estate since 2011 providing expert arboricultural care and GPS mapping for the estate’s historic trees, as well as support from their research facility.   Mount Vernon is proud to partner with Bartlett Tree Experts and appreciates their sponsorship of George Washington’s Mount Vernon Plant Finder App.

    Bring Washington's Garden Home

    Purchase our historic seeds, collected from plants grown at Mount Vernon and plant them in your own garden.

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