Sister Theresa Hydrangea
Hydrangea macrophylla 'Sister Theresa'
Sister Theresa Hydrangea flowers
(Photo courtesy of NetPS Plant Finder)
Height: 5 feet
Spread: 5 feet
Hardiness Zone: 5b
Other Names: French Hydrangea, Bigleaf Hydrangea
One of the showiest and most popular summer-blooming garden shrubs featuring large pink globe-shaped flowers with blue edges, needs acidic soils, somewhat coarse leaves; blooms on old wood so protecting flower buds in winter may be necessary
Sister Theresa Hydrangea features bold balls of pink flowers with blue overtones at the ends of the branches from mid summer to early fall. The flowers are excellent for cutting. It has forest green deciduous foliage. The glossy pointy leaves do not develop any appreciable fall color.
Sister Theresa Hydrangea is a multi-stemmed deciduous shrub with a more or less rounded form. Its relatively coarse texture can be used to stand it apart from other landscape plants with finer foliage.
This shrub will require occasional maintenance and upkeep, and should only be pruned after flowering to avoid removing any of the current season's flowers. It has no significant negative characteristics.
Sister Theresa Hydrangea is recommended for the following landscape applications;
- Mass Planting
- General Garden Use
- Container Planting
Planting & Growing
Sister Theresa Hydrangea will grow to be about 5 feet tall at maturity, with a spread of 5 feet. It tends to be a little leggy, with a typical clearance of 1 foot from the ground, and is suitable for planting under power lines. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 20 years.
This shrub does best in a location that gets morning sunlight but is shaded from the hot afternoon sun, although it will also grow in partial shade. Keep it away from hot, dry locations that receive direct afternoon sun or which get reflected sunlight, such as against the south side of a white wall. It requires an evenly moist well-drained soil for optimal growth. It may require supplemental watering during periods of drought or extended heat. It is not particular as to soil type, but has a definite preference for acidic soils. It is highly tolerant of urban pollution and will even thrive in inner city environments, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in both summer and winter to conserve soil moisture and protect it in exposed locations or colder microclimates. This is a selected variety of a species not originally from North America.
Sister Theresa Hydrangea makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. Because of its height, it is often used as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. It is even sizeable enough that it can be grown alone in a suitable container. Note that when grown in a container, it may not perform exactly as indicated on the tag - this is to be expected. Also note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.