Hydrangea macrophylla 'Spike'
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Hydrangea macrophylla 'Spike'

Spike Hydrangea, Bigleaf Hydrangea 'Spike', Mophead Hydrangea 'Spike', Hortensia 'Spike'


Noted for its unique ruffled flowers, Hydrangea macrophylla 'Spike' is a compact deciduous shrub with dome-shaped clusters of pink or blue flowers, adorned with strongly ruffled petals. Blooming from early to late summer, the remarkable blossoms are shades of blue if grown on acidic soil and pink if grown on neutral to alkaline soil. They mature to green as the season progresses. The foliage is dark green with broadly oval, serrated leaves. Spike hydrangea is perfect for growing in a mixed border, or a large patio container.

  • This deciduous shrub has a round habit, typically growing 3-4 ft. tall and wide (90-120 cm).
  • A sun to part shade lover, it is best grown in rich, medium moisture, well-drained soils. Full sun is tolerated if constant moisture is provided.
  • No serious pest or disease issues. Watch for bud blight, bacterial wilt, leaf spot and mildew.
  • Perfect from foundation plantings to container plantings. Massed in a sheltered location or as an accent plant. Effective as an hedge and makes excellent cut flowers too!
  • Remove spent flowers to promote new blooms.
  • Blue in acidic soils, the flowers turn pink in alkaline soils. To change their color, add aluminum sulfate to the soil to make the flowers bluer or add lime to the soil to make them pinker. Treatment should occur ahead of time (late fall or early spring).
  • This beautiful deciduous shrub should be pruned after flowering by cutting back the stems to a pair of healthy buds. Prune out weak or winter-damaged stems in early spring.
  • Propagate by softwood cuttings in early summer, or by hardwood cuttings in winter.
  • Hydrangea macrophylla species is native to Japan. It is reported from seaside habitats as well as mountains in Japan, from Honshu southwards. This species has naturalized in China, New Zealand and the Americas.
  • May cause mild stomach upset if ingested, contact with foliage may aggravate skin allergies. Wear gloves and other protective equipment when handling.
  • Toxic to dogs, toxic to cats, toxic to horses.

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Requirements

Hardiness 5 – 9
Heat Zones 6 – 9
Climate Zones 3, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1
Plant Type Shrubs
Plant Family Hydrangeas
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 3' – 4' (90cm – 120cm)
Spread 3' – 4' (90cm – 120cm)
Spacing 48" (120cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Showy
Garden Uses Beds and Borders, Patio and Containers, Small Gardens, Wall-Side Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Traditional Garden

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Concept Plants

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 5 – 9
Heat Zones 6 – 9
Climate Zones 3, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1
Plant Type Shrubs
Plant Family Hydrangeas
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 3' – 4' (90cm – 120cm)
Spread 3' – 4' (90cm – 120cm)
Spacing 48" (120cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Showy
Garden Uses Beds and Borders, Patio and Containers, Small Gardens, Wall-Side Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Traditional Garden

Great Plant Combination Ideas with Hydrangeas

Guides with Hydrangeas

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