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Mophead Hydrangea

Hydrangea macrophylla

Also listed as Hydrangea hortensis, Hortensia japonica

Also known as French Hydrangea, Common Hydrangea, Bigleaf Hydrangea

shrubβ›… part shadeπŸ’§πŸ’§πŸ’§ high water❄ Hardy: Zone 5b – Zone 9b

Climate Match for your location

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Mophead hydrangea is a deciduous shrub prized for its large, showy flower heads in pink, blue, or purple depending on soil pH. It thrives in part shade with consistent moisture and produces blooms mid-summer through fall.

Why grow it

Mophead hydrangea offers larger individual flower clusters than panicle or oakleaf hydrangeas, making it a strong choice for bold visual impact in mid-summer gardens. The bloom color responds to soil pH, providing a tool for deliberate garden color schemes that other hydrangeas lack to the same degree. It reaches modest mature size (3-6 feet) compared to some oakleaf cultivars, suiting smaller landscapes where space is limited.

Watch out for

Flower bud formation occurs in late summer and fall, making late-season hard pruning counterproductive; many gardeners prune only to remove dead wood. Consistent soil moisture is essential, particularly during establishment and heat stress, as irregular watering can cause bud drop or reduced flowering. In regions with late spring frosts, new growth can be damaged, resulting in reduced bloom that season.

Overview

Form
Mounding
Growth Rate
moderate
Size
3–4β€² tall Γ— 3–8β€² wide
Dormancy
deciduous
Family
Hydrangeaceae
HedgerowPollinators & beneficial insects

Native Range

Eastern Asia

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

SummerFall

Notable Cultivars

Nikko Blue is a classic cultivar with deep blue flowers; Endless Summer reblooms on new wood extending the season; Incrediball produces massive pure white blooms and is notably hardy and disease-resistant.

Similar shrubs you might consider:

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Companion Planting

Plants well with