View Larger Siberian Iris

Planted at Mount Vernon

Planted at Mount Vernon Upper Garden

  • Upper Garden

  • Hardiness Zones

    3 3 4 4b 5 5b 6 6b 7 7b 8 8b USDA basemap

    Average annual extreme minimum temperature 1976-2005

    map legend 3 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b

    Thick clumps of spiky foliage and bright purple or blue flowers are perfect for mid-border planting. Like their German cousins, these benefit from division so they don't grow hollow in the middle.

    Latin Name

    Iris sibirica



    Also Known As

    Siberian flag

    Type of Plant

    Perennials Perennials

    Bloom Season



    Spring Spring


    Max height Max Height: 4'
    Max spread Max Spread: 3'


  • Flower Border

  • Sunlight Exposure

    Full Sun Full Sun
    Part Shade Part Shade


  • Deer
  • Rabbit
  • Drought
  • Clay Soil
  • Erosion
  • Wet Soil

  • Attracted Wildlife

    Butterflies Butterflies


    Do not ingest Do not ingest
    Skin irritant Skin irritant


    Native Range

    Europe and Central Asia


    Plant collector John Bartram of Philadelphia listed Siberian irises in his catalog for 1771 to 1809.

    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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