Hydrangea macrophylla 'Bailmer' [sold as Endless Summer®]
Endless Summer Bigleaf Hydrangea

Hydrangea macrophylla ′Bailmer′ [sold as Endless Summer®] - Shrub Habit

Family:

Hydrangeaceae (Hydrangea Family) 35

Genus:

Hydrangea (Hydrangea) 26

Plant Type:

Shrub 468

Growth Forms:

Bushy 187

Hardiness:

USDA Zone 4 515

Deciduous / Evergreen:

Deciduous 836

Flower Notes:

Blue;purple;pink (Blue flowers - acidic soil; purple flowers - slightly acidic soil; pink flowers - alkaline soils; summer)

Foliage Notes:

Green (Dark green summer foliage); Yellow (Fall; pale yellow, generally not overwhelming)

Fruit Notes:

Brown (Capsule; not ornamentally important)

Ultimate Height:

3-4 feet

Ultimate Spread:

3-4 feet

Light Requirements:

Soil Notes:

Needs moist organic soil; highly acidic soil (pH 5.0-5.5) = blue flowers, slightly acidic soil (pH 5.5-6.0) = purple flowers, alkaline soil (pH 6.0-6.5) = pink flowers

Diagnostic Characteristics:

Leaves (4-8" long by 3-6" wide) are simple, serrated, and opposite in arrangement. Large leaf scars. Stems emerge from ground with few branches. Flower panicles persist and occur on both new and old growth so that plants bloom all through summer and well into fall.

Special Characteristics:

Flowering Characteristics 289

Additional Information

'Bailmer' is an excellent mophead (hortensia) cultivar for cold climates, as it is hardy to USDA zone 4 and produces flowers on both old and new growth, unlike other Hydrangea macrophylla variants. As the name Endless Summer suggests, this plant blooms all summer, and even into the fall. An acidic soil will produce a very blue colored flower and alkaline pink. High quality foliage. Performs poorly on hot dry sites. A few pest problems, including scale, mites, powdery mildew, and leaf spot.