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Tuff Stuff Ah-Ha® Reblooming Mountain Hydrangea Hydrangea serrata

  • Hardy Zones
    • 5 - 9
  • Exposure
    • Part Sun to Sun
  • Season
    • Summer
    • Fall
  • Mature Size
    • 24 - 36 Inches
New Plant
ColorChoice® Flowering Shrubs
ColorChoice® Flowering Shrubs
Tuff Stuff Ah-Ha® Reblooming Mountain Hydrangea Hydrangea serrata
Part Sun to Sun 24 - 36

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. Available in better garden centers in spring 2019.

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

Duration: 
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
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' USPPAF, Can PBRAF
  • 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

    Outstanding My favorite plant, I recommend to others all the time and explain the reasons why I like it so much.
    Jennifer Winship
    Vernon
    British Columbia
    Canada
    13 weeks ago
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