Hydrangea macrophylla ‘Sister Theresa’, commonly known as Sister Theresa Hydrangea, is a mophead hydrangea known for its elegant clusters of creamy white flowers that gradually age to soft pink as the season progresses. Growing 3 to 5 feet tall and wide, this deciduous shrub has a rounded habit with deep green foliage that beautifully sets off the blooms. Flowering on old wood, ‘Sister Theresa’ performs best in sheltered locations with minimal pruning. Its soft color palette and classic form make it an ideal choice for foundation plantings, shaded borders, and cottage-style gardens.

Why choose Sister Theresa Hydrangea

Elegant white blooms: Soft, creamy flowers shift to pink with age

Classic mophead form: Full, rounded clusters add structure and beauty

Refined color: Perfect for subtle, sophisticated garden designs

Cultivating tips

Sun exposure: Part shade preferred; avoid hot afternoon sun

Soil needs: Moist, well-drained soil enriched with organic matter

Maintenance: Low—prune only after flowering to preserve next year’s buds

Designs for your garden

Cottage gardens: Beautiful alongside hostas, ferns, and astilbes

Foundation beds: Softens edges and adds classic charm

Shaded borders: Brings gentle brightness to low-light garden areas

Ecological benefits

Pollinator support: Some benefit for bees, especially in early bloom stages

Seasonal interest: Adds texture, bloom color, and form from spring to fall

Deer resistance: Typically left alone by deer

Similar native alternatives

Looking for a native option? Here are three native plants that offer similar seasonal interest and landscape value:

– Baccharis halimifolia – Groundsel Bush

– Spiraea latifolia – Meadowsweet

– Astible japonica Deutschland – Astilbe