Alphabetical Plant Listing

Hydrangea macrophylla 'Nikko Blue'

Bigleaf Hydrangea 'Nikko Blue', Mophead Hydrangea 'Nikko Blue', Hortensia 'Nikko Blue'


Hugely popular - and deservedly so - Hydrangea macrophylla 'Nikko Blue' features large, rounded flower heads, up to 5 in. across (12 cm), densely packed with rich, deep blue florets. Blooming in early summer for up to 2 months, 'Nikko Blue' is very floriferous and produces new flower stems throughout the summer. The foliage is medium green with large, lustrous, serrated leaves. A classic name in mophead hydrangeas, it has become the standard against which other blue hydrangeas are measured.

  • Vigorous, this deciduous shrub has a round habit, typically growing 4-6 ft. tall and wide (120-180 cm).
  • A 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!
  • 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).
  • Remove spent flowers to promote new blooms.
  • 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.

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Requirements

Hardiness 6 – 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 Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 4' – 6' (120cm – 180cm)
Spread 4' – 6' (120cm – 180cm)
Spacing 72" (180cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Showy
Garden Uses Beds and Borders, Hedges and Screens, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage, Traditional Garden

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Erica Enterprise

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 6 – 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 Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 4' – 6' (120cm – 180cm)
Spread 4' – 6' (120cm – 180cm)
Spacing 72" (180cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Showy
Garden Uses Beds and Borders, Hedges and Screens, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage, Traditional Garden

Great Plant Combination Ideas with Hydrangeas

Guides with Hydrangeas

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