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'Blacknight' Hollyhock Alcea rosea

Exposure
  • Sun
Flower Season
  • Summer
Mature Size
6' 2' 1.8m 61cm
Height: 5' - 6'
Spread: 2'
Height: 1.5m - 1.8m
Spread: 61cm
Proven Selections
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  • 60 - 72 Inches
    24 - 24 Inches
    24 - 24 Inches
    1.5m - 1.8m
    61cm
    61cm

    Features

    Deep black-purple, single flowers are produced on tall, sturdy stalks in midsummer.

    Attracts: 
    Butterflies
    Hummingbirds

    Characteristics

    Plant Type: 
    Perennial
    Height Category: 
    Tall
    Garden Height: 
    60 - 72 Inches 1.5m - 1.8m
    Spacing: 
    24 Inches 61cm
    Spread: 
    24 Inches 61cm
    Flower Colors: 
    Purple
    Flower Shade: 
    Purple shades to near-black shades
    Foliage Colors: 
    Green
    Foliage Shade: 
    Green shades
    Habit: 
    Upright
    Container Role: 
    Thriller

    Plant Needs

    Light Requirement: 
    Sun

    The optimum amount of sun or shade each plant needs to thrive: Full Sun (6+ hours), Part Sun (4-6 hours), Full Shade (up to 4 hours).

    Maintenance Category: 
    Easy
    Bloom Time: 
    Mid Summer
    Hardiness Zones: 
    3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
    Water Category: 
    Average
    Uses: 
    Border Plant
    Uses: 
    Cut Flower
    Uses: 
    Dried Flower
    Uses: 
    Mass Planting
    Uses: 
    Specimen or Focal Point
    Maintenance Notes: 

    Hollyhocks provide excellent architectural height in the garden and make good backdrops for lower growing perennials. Try growing them in the cottage garden style by planting them up against a wall or picket fence. Though their stalks are very strong, they may need to be staked if they are planted in a windy site.

    Hollyhocks prefer rich, moist, well-drained soil but can tolerate short periods of drought. They need full sun to really perform in the landscape. Watch for Japanese Beetles; this plant is one of their favorites!

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