Hydrangea macrophylla Endless Summer® Bloomstruck®

(Bloomstruck Hydrangea)


Hardiness Zones:

 6a  6b  7a  7b  8a  8b  9a  9b

Quick Overview:

BLOOMSTRUCK has 3.5 to 5 in. wide mophead-type flower heads that are vivid deep rose to violet blue depending on the soil pH. The shrub will rebloom all summer long. It has strong red-purple stems and dark green leaves with red petioles and red veins and turns reddish purple in fall.


Best grown in rich, medium moisture, well-drained soils in part shade. Tolerates full sun only if grown in consistently moist soils. Soil pH affects the flower color (blue in highly acidic soils and lilac to pink in slightly acidic to alkaline soils). Add aluminum sulfate to the soil to make the flowers bluer or add lime to the soil to make the flowers pinker. Begin soil treatments well in advance of flowering, as in late autumn or early spring. Plants generally need little pruning. If needed, prune immediately after flowering by cutting back flowering stems to a pair of healthy buds. Prune out weak or winter-damaged stems in late winter/early spring. Best to mulch plants year-round with 3″ of shredded bark, peat or compost. Winter hardy to USDA Zone 6.   (Courtesy of Missouri Botanical Garden Plant Finder)

Additional information

Common Name

Bloomstruck Hydrangea

Botanical Name

Hudrangea macrophylla 'PIIHM-II'


3 gallon

Evergreen or Deciduous


Hardiness Zone

6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b

Growth Rate


Light Requirements

Part-shade, Part-sun


3 to 4 feet


4 to 5'

Soil Condition


Water Needs

Average, Consistent moisture

Blooming Period


Flower Color

Rose to Violet Blue



Foliage Color


Deer Resistant


Fall Color

Reddish purple

Pin It on Pinterest