Hydrangea macrophylla 'Sister Theresa'

Sister Theresa Hydrangea

Hydrangea macrophylla ‘Sister Theresa’ is a deciduous shrub valued for its large mophead flower clusters that open creamy white and often mature with soft blush pink tones. This bigleaf hydrangea blooms in summer on old wood, producing full rounded flower heads that stand out clearly against dark green foliage. Its clean white coloring gives it a bright, elegant appearance in shaded garden spaces.

Type: Deciduous shrub
Mature Size: Width: 4–6 ft · Height: 4–6 ft
USDA Zones: 6a–9b

Form: Rounded, upright

Light: Part shade to morning sun

Soil: Rich, moist, well-drained soil

Water: Medium; prefers consistently moist soil

Wildlife: Attracts bees and other pollinating insects

Features & Landscape Uses:
Excellent for foundation plantings, borders, woodland gardens, and mixed shrub beds where white blooms provide contrast and brightness. The flowers are also useful for fresh-cut arrangements.

Care:
Plant in part shade with fertile, evenly moist soil enriched with organic matter. Prune only after flowering since buds develop on old wood. Mulch roots to conserve moisture and protect flower buds during winter.

Plant type

Flowering Deciduous Shrub

Height

4-6'

Width

4-6'

Hardiness zones

5–9

Sunlight

Full Sun, Partial Shade

Growth rate

Moderate

Bloom time

Early Fall, Late Summer, Summer

Flower color

White

Leaf color

Green

Fall color

Green

Attracts

Butterflies, Hummingbirds

Soil

Moist well-drained, Rich

Landscape use

Accent Plant, Border, Container, Foundation Plant, Mass Planting

Shape

Rounded, Upright

Bark

Smooth

Fruit

Yes

Salt tolerant

Yes

Drought tolerant

No