Plant Lust
ShopOrderSellblog
0

  • Plant types

  • Plant styles

  • Planting conditions

  • Seasonal interest

  • Nurseries & Gardens

    • Photo of Dahlia 'Union Jack' flower by Old House Gardens

    Photo by Old House Gardens

    Used with permission, all rights reserved

    Show all photos

    Dahlia 'Union Jack'

    Also Known As

    • Union Jack Dahlia

    Plant type

    perennial, bulb / corm / tuber

    size

    • H: 24"-36"
    • W: 12"-20"

    planting zones

    • 9a-11

    More Options

    Dahlia 'Union Jack' plant details

    Dahlia 'Union Jack' is a broadleaf deciduous perennial bulb / corm / tuber with green foliage. In fall and summer red flowers emerge. Grows well with sun and even moisture water. Does well in average, gritty, rich and well-drained soil.

    CHARACTERISTICS OF Dahlia 'Union Jack'

    Plant type: perennial bulb / corm / tuber
    Plant family: asteraceae
    Foliage: deciduous green
    Mature size: 12 IN - 20 IN - wide, 24 IN - 36 IN - tall
    Flowers: red blooms in fall and summer

    GROWING CONDITIONS for Dahlia 'Union Jack'

    USDA Zones: 9a - 11
    Sun exposure: sun
    Watering frequency: even moisture
    Soil needs: average, gritty, rich and well-drained

    Nursery contributed plant descriptions

    This candy-cane striped dahlia is one of the world's oldest, according to the late Gerry Weland of the ADS who compiled a database of 50,000 dahlias dating back to the early 1800s. Also known as 'Star of Denmark', it's bright and cheery, with pinwheel-like flowers of red and white. One caveat, though: its stems, like those of its wild ancestors, are lax.

    By: Old House Gardens

    Gardening facts about Dahlia 'Union Jack' plant

    How to Grow Dahlia 'Union Jack'

    • Sun Exposure

      • sun

    • Water Needs

      • even moisture

    • Soil Needs

      • average
      • well-drained
      • rich
      • gritty

    Features

    • Foliage Color

      • green

    • Flower Color

      • red

    • Flower Season

      • summer
      • fall

    • Foliage Season

      • deciduous

    Landscape groups by tags

    See other plant types of Dahlia for your garden

    Dahlia 'Moonfire'

    aka Moonfire Dahlia

    Plant Type

    Perennial, Bulb / Corm / Tuber

    Zones

    9a-11

    Size

    Height: 2'-3'

    Width: 3'

    • sun - mostly shade
    • even moisture
    Photo of Dahlia 'Moonfire' flower by Stan Shebs
    View Plant

    Dahlia 'Bishop of Llandaff'

    aka Dahlia 'Bishop of Landaff', Bishop of Landaff Dahlia

    Plant Type

    Perennial, Bulb / Corm / Tuber

    Zones

    7a-11

    Size

    Height: 30"-4'

    Width: 2'-2'

    • sun - mostly shade
    • even moisture - regular
    Photo of Dahlia 'Bishop of Llandaff' flower by Leafari
    View Plant

    More Options

    Dahlia 'Bonne Esperance'

    Plant Type

    Perennial, Bulb / Corm / Tuber

    Zones

    8a-11

    Size

    Height: 12"-18"

    Width: 12"-18"

    • sun - mostly shade
    • even moisture - regular
    Photo of Dahlia 'Bonne Esperance' flower by Cistus Nursery
    View Plant

    More Options

    Dahlia imperialis

    aka Giant Tree Dahlia, Tree Dahlia

    Plant Type

    Perennial, Bulb / Corm / Tuber

    Zones

    7a-9b

    Size

    Height: 17'-25'

    Width: 7'-15'

    • sun - mostly shade
    • even moisture
    Photo of Dahlia imperialis flower by Annie's Annuals & Perennials
    View Plant

    More Options

    Dahlia 'Fascination'

    aka Fascination Dahlia

    Plant Type

    Perennial, Bulb / Corm / Tuber

    Zones

    7a-10b

    Size

    Height: 24"-30"

    Width: 18"-30"

    • sun - mostly shade
    • even moisture - regular
    Photo of Dahlia 'Fascination' close-up, flower by Loicwood
    View Plant
    +224 more Dahlia
    Mailing List
    Sign Up for updates on new plant arrivals and deals

    © 2010—2026 Plant Lust, LLC All Rights Reserved