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Tuff Stuff Ah-Ha® Reblooming Mountain Hydrangea Hydrangea serrata

Exposure
  • Part Sun to Sun
  • 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).

Flower Season
  • Summer
  • Fall
Mature Size
36" 36"
Height
24 - 36"
Spread
24 - 36"
  • Details

    Features

    When it comes to blooming, Tuff Stuff Ah-Ha® hydrangea can't stop, won't stop! 

    At first glance, it would appear that we decided to introduce this beautiful mountain hydrangea solely for its waterlily-like double florets. But that's only part of the story - this is also one of the most prolific reblooming hydrangeas we've ever seen. All summer long, it devotes its energies to creating flower buds on its new growth so that you have a constant supply of fabulous blooms from early summer through frost. Tuff Stuff Ah-Ha® hydrangea will bloom pink or blue, depending on soil chemistry. 

    Top reasons to grow Tuff Stuff Ah-Ha hydrangea:

    • Our best rebloomer yet - creates new flower buds all summer long.
    • Double florets look like pink or blue waterlilies.
    • Flower buds are more cold-tolerant, which ensures good blooming even in USDA zones 5 and 6.
    Continuous Bloom or Rebloomer

    Characteristics

    Plant Type: 
    Shrub
    Shrub Type: 
    Deciduous
    Height Category: 
    Short
    Garden Height: 
    24 - 36 Inches
    Spacing: 
    24 - 36 Inches
    Spread: 
    24 - 36 Inches
    Flower Colors: 
    Blue
    Flower Colors: 
    Pink
    Flower Shade: 
    Pink or Blue
    Foliage Colors: 
    Green
    Foliage Shade: 
    Green
    Habit: 
    Mounded
    Container Role: 
    Thriller

    Plant Needs

    Light Requirement: 
    Part Sun to Sun
    Light Requirement: 
    Sun
    Maintenance Category: 
    Easy
    Blooms On: 
    New Wood
    Blooms On: 
    Old Wood
    Bloom Time: 
    Summer through Fall
    Hardiness Zones: 
    5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
    Water Category: 
    Average
    Uses: 
    Border Plant
    Uses: 
    Container
    Uses: 
    Cut Flower
    Uses: 
    Edging Plant
    Uses: 
    Landscape
    Uses: 
    Mass Planting
    Uses: 
    Specimen or Focal Point
    Uses Notes: 

    Tuff Stuff Ah-Ha hydrangea works in many landscape applications. We recommend a minimum of 4 hours of sun each day for best flowering and color. In hot climates, shade during the hottest part of the day is imperative.

    Maintenance Notes: 

    Tuff Stuff Ah-Ha hydrangea does not need pruning except to remove any dead wood in early spring. You should not cut back or trim this plant at any time of the year, as doing so will remove flower buds. Hydrangeas are shallow-rooted and benefit from a 2-3" layer of shredded bark mulch. If you wish, you may fertilize in early spring, once the ground has thawed, with a granular fertilizer formulated for woody plants, like a rose fertilizer. 

    This plant does not require deadheading, though if you wish to remove spent flowers, you may - we made a video showing how to do this.

    Fun Facts: 

    Mountain hydrangeas, Hydrangea serrata, are native to the same areas of Japan as big-leaf hydrangea, Hydrangea macrophylla. However, big-leaf hydrangeas grow along the mild coast while mountain hydrangeas grow up in the mountains. As a result, they have naturally developed flower buds that are more tolerant to cold conditions than big-leaf hydrangeas, so they bloom more reliably in USDA zones 5 and 6.

    Tuff Stuff Ah-Ha® Hydrangea serrata 'SMNHSDD' USPP 29,832, Can PBRAF
  • 2 Reviews

    5
    2
    4
    3
    2
    1
    • Grows well and seems to be blooming pink, with new growth on stem coming in.

      Lisa Dov
      , Minnesota
      , United States
      , 1 year ago
    • I just received this plant this year as a test trial and it has bloomed right away. The one thing so far I noticed is that the blooms are pink, not blue, due to soil ph, but still very pretty

      Jennifer Winship
      , British Columbia
      , Canada
      , 2 years ago
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