




Meet the Breeder
Tim Wood
Grand Haven, MI, USA
TUFF STUFF AH-HA®

Hydrangea - Mountain
Hydrangea serrata
'SMNHSDD'
USPP 29,832; CBRAF




- Improved hardiness
- Reblooming
- Colorful blooms
A truly outstanding Hydrangea serrata. Standing out notably in our field and container trials for its outstanding reblooming ability, Tuff Stuff Ah-Ha® mountain hydrangea, the newest member of the series, has massive dinner plate sized blooms. Sterile florets are doubled and waterlily-like, taking on outstanding pink or blue coloration depending on soil conditions. Like all H. serrata, it has outstanding bud hardiness. Prepare to be impressed!
USDA Zone 5 - 9 (-20°F/-28.9°C)

Exposure Full sun, Part sun
Height 2 - 3'
Width 2 - 3'
Finish Time 1 season
Type Deciduous
Bloom Time Summer - fall
Foliage Color Green
Liner Sizes 4", Quick Turn
General Care
Soil Moist but well drained soils are best. Mountain hydrangeas are less susceptible to wilting than bigleaf hydrangeas, but cannot take soggy conditions for any period of time. Tolerant of a range of soil pH levels, however, soil pH will influence flower color.
Pruning Avoid pruning mountain hydrangeas, except to remove any dead wood. These hydrangeas cannot be cut back or trimmed at any time of the year without impacting the bloom for either the current season or the next. Though they do rebloom readily on new wood, the best display comes from treating them as though they bloom only old wood.
Uses Mountain hydrangeas can be used the same as bigleaf hydrangeas: perfect for flower gardens, cottage gardens, and seaside plantings. They also make a showy addition to foundation plantings and can be used for low hedges or edging.
Growing Tips Mountain hydrangeas are from the same area of Japan as bigleaf hydrangeas but grow in the mountains instead of the seaside. As a result, they have naturally developed better cold tolerance and thus make an outstanding choice for gardens in USDA zones 5 and 6 especially. Fast to grow, but due to its propensity to rebloom, puts most energy into flower bud production over vegetatitve growth in summer.
Features: Attracts pollinators, Alkaline soil, Clay soil, Cut flower, Heat tolerant, Salt tolerant, Reblooming, Compact
Filters: Botanical genus: Hydrangea , Common name: Hydrangea - Mountain, Retail program: Proven Winners® ColorChoice®, USDA Zone 5, USDA Zone 6, USDA Zone 7, USDA Zone 8, USDA Zone 9, Exposure: Full sun, Exposure: Part sun, Bloom time: Summer, Green foliage
Features: Attracts pollinators, Alkaline soil, Clay soil, Cut flower, Heat tolerant, Salt tolerant, Reblooming, Compact
Filters: Botanical genus: Hydrangea , Common name: Hydrangea - Mountain, Retail program: Proven Winners® ColorChoice®, USDA Zone 5, USDA Zone 6, USDA Zone 7, USDA Zone 8, USDA Zone 9, Exposure: Full sun, Exposure: Part sun, Bloom time: Summer, Green foliage