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Key characteristics

Family: Hydrangeaceae
Height: Up to 5 feet
Width: Approximately 5 feet
Flower color: Sky blue (acidic soil) or pinkish (alkaline soil); flowers mature to cream splashed with green
Foliage color: Forest green, with dark stems
Bloom time: Late spring to early fall
Light: Full sun to partial shade
Water: Moist, well-drained soil
Maintenance: Low; prune after flowering as needed
Growing zone: USDA zones 4 to 9
Wildlife: Attracts pollinators such as bees and butterflies

Shrubs

Hydrangea macrophylla 'Monmar'

Blue Enchantress Hydrangea

Hydrangea macrophylla 'Monmar', known as Blue Enchantress Hydrangea, is a mophead hydrangea distinguished by its vibrant flowers and unique dark burgundy stems. Blooming from late spring through summer, its large, rounded clusters of flowers shift between vivid blue to deep pink depending on soil pH. The dramatic contrast between the blooms and the dark stems adds a touch of elegance to gardens and arrangements.

This cultivar was bred to enhance both beauty and versatility, offering gardeners a stunning choice for borders or containers.

Light

Full sun to partial shade

Water

Moist, well-drained soil

Bloom time

Late spring to early fall

Find this plant

Works well in

Shade Gardens
Foundation Plantings
Cut Flower Gardens
Cottage Gardens

Companion plants

Sweet box · Bleeding heart · Pieris · Foam flower · Lungwort · Ajuga

Design tip

Take advantage of ‘Blue Enchantress’ dark burgundy stems by keeping its lower branching visible rather than completely obscuring it with neighboring plants. The exposed stems add definition beneath the large mophead flowers and extend its ornamental value beyond bloom color alone.

Printable plant sheet (PDF)