Photo of Dahlia 'Knockout' foliage by Little Prince of Oregon

Photo by Little Prince of Oregon

Used with permission, all rights reserved.

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Dahlia 'Knockout'

Also Known As

  • Dahlia 'Mystic Illusion'
  • Dahlia Mystic Illusion

Plant type

perennial, bulb / corm / tuber

size

  • H: 24"-30"
  • W: 18"-24"

planting zones

  • 8a-11

More Options

Dahlia 'Knockout' plant details

Dahlia 'Knockout' is a broadleaf deciduous perennial bulb / corm / tuber with chocolate and purple foliage. In summer yellow flowers emerge. Attracts bees, beneficial insects and butterflies making it an excellent addition to pollinator gardens. Grows well with sun and regular water. Does well in average, rich and well-drained soil. A good option if you're seeking something heat tolerant.

CHARACTERISTICS OF Dahlia 'Knockout'

Plant type: perennial bulb / corm / tuber
Plant family: asteraceae
Foliage: deciduous chocolate and purple
Mature size: 18 IN - 24 IN - wide, 24 IN - 30 IN - tall
Flowers: yellow blooms in summer
Uses: cottage garden, cutting garden, long-blooming

GROWING CONDITIONS for Dahlia 'Knockout'

USDA Zones: 8a - 11
Sun exposure: sun
Watering frequency: regular
Resistant to: heat
Soil needs: average, rich and well-drained

Nursery contributed plant descriptions

Dahlia ‘Mystic Illusion’ is an upright, well-branched plant that displays mahogany-black foliage and pale yellow flowers. Provides long lasting color in the garden. Dahlias grow best in humus-rich, well-drained soil. Water regularly during dry periods and fertilize every other week. Deadhead to encourage continuous bloom.

Gardening facts about Dahlia 'Knockout' plant

How to Grow Dahlia 'Knockout'

  • Sun Exposure

    • sun
  • Water Needs

    • regular
  • Soil Needs

    • average
    • well-drained
    • rich
  • Special Situation

    • heat tolerant

Features

  • Foliage Color

    • purple
    • chocolate
  • Flower Color

    • yellow
  • Wildlife

    • beneficial insects
    • bees
    • butterflies
  • Flower Season

    • summer
  • Foliage Season

    • deciduous
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