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The Plant Guide

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Mountain hydrangea

Hydrangea serrata

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Hydrangea serrata 'Blue Billow'

This species was formerly grouped with the Lacecap hydrangeas because of its flattened flowerheads that consist of central, small florets surrounded by showy, larger florets. It is similiar to H. macrophylla but is a more compact plant with smaller flowers and leaves.

Noteworthy CharacteristicsBlue or pink lacy flowerheads.

CareGrow in moist, but well-drained soil, in sun to partial shade. Provide shelter from drying winds.

PropagationSow seed in a cold frame in spring; take softwood cuttings in early summer, hardwood cuttings in winter.

ProblemsGray mold, slugs, powdery mildew, rust, ringspot virus, leaf spots.

  • Genus : Hydrangea
  • Plant Height : 3 to 6 feet
  • Plant Width : 3 to 6 feet
  • Zones : 6, 7, 8, 9
  • Uses : Containers
  • Bloom Time : Fall, Summer
  • Tolerance : Frost Tolerant
  • Light : Full Sun to Partial Shade
  • Maintenance : Low
  • Moisture : Medium to Wet
  • Growth Rate : Moderate
  • Flower Color : Pink
  • Characteristics : Showy Seed Heads
  • Plant Type : Shrubs
  • Plant Seasonal Interest : Summer Interest
View Comments


  1. just_another_indian 07/21/2016

    Hardiness zone information would have been helpful. Frost tolerant? The buds, the whole plant? I realize that you can't pack everything in, but a line with hardiness zone would be not that much of an addition. But thanks!

  2. just_another_indian 07/21/2016

    Ah, just saw the chart beneath the plant. That is hardiness zone, correct? Forget my earlier message. Best.

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