Endless Summer Hydrangea
Hydrangea macrophylla 'Bailmer'
The breakthrough hydrangea that blooms on both old and new wood, ensuring spectacular flower displays even after harsh winters. This reblooming marvel produces large mophead flowers that can be blue, pink, or purple depending on soil pH, creating a stunning focal point from early summer through fall. Perfect for gardeners who thought hydrangeas were too finicky for their climate.
Sun
Morning sun
Zones
6–11
USDA hardiness
Height
3-6 feet
Planting Timeline
Showing dates for Endless Summer Hydrangea in USDA Zone 7
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Endless Summer Hydrangea · Zones 6–11
Growing Details
Zone-by-Zone Planting Calendar
Complete Growing Guide
Soil: Clay, High Organic Matter, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Wet. Height: 3 ft. 0 in. - 6 ft. 0 in.. Spread: 3 ft. 0 in. - 6 ft. 0 in.. Spacing: 3 feet-6 feet. Growth rate: Rapid. Maintenance: Low. Propagation: Layering, Leaf Cutting, Stem Cutting. Regions: Coastal, Mountains, Piedmont.
Harvesting
cup-like capsule
Type: Capsule.
Harvest time: Fall
Bloom time: Summer
Advantages
- +Disease resistance: Salt
- +Attracts: Height: 3 ft. 0 in. - 6 ft. 0 in., Width: 3 ft. 0 in. - 6 ft. 0 in.
- +Wildlife value: Dead stems are used by stem-nesting bees.
- +Fast-growing
- +Low maintenance
Considerations
- -Toxic (Bark, Flowers, Leaves): Low severity
Companion Plants
Plant Together
Hostas
Similar shade and moisture requirements, complementary foliage textures
Astilbe
Thrives in similar acidic, moist soil conditions and partial shade
Ferns
Compatible moisture needs and creates layered woodland garden aesthetic
Azaleas
Both prefer acidic soil and benefit from similar fertilization schedule
Heuchera
Enjoys similar growing conditions and provides attractive ground cover
Japanese Painted Fern
Complementary silver foliage contrasts beautifully with hydrangea blooms
Impatiens
Thrives in shade with consistent moisture, extends bloom season
Caladiums
Colorful foliage complements hydrangea flowers in shaded areas
Keep Apart
Black Walnut Tree
Produces juglone which is toxic to hydrangeas and inhibits growth
Eucalyptus
Allelopathic compounds suppress hydrangea root development
Pine Trees
Excessive needle drop creates overly acidic soil and competes for moisture
Pests & Disease Resistance
Resistance
Good resistance to most hydrangea diseases
Common Pests
Aphids, spider mites, scale insects
Diseases
Powdery mildew, leaf spot, botrytis blight