Astilbe × arendsii 'Sister Theresa' - 2026

Astilbe × arendsii 'Sister Theresa' is a delicate perennial prized for its upright plumes of soft white flowers that bloom in midsummer above dark green, finely divided foliage. Its feathery flower spikes create a graceful, textured display, adding brightness and elegance to shaded borders, woodland gardens, or pondside plantings. The long-lasting blooms combined with ornamental foliage provide sustained visual interest, making it ideal for group plantings or mixed perennial borders.

Thriving in humus-rich, consistently moist soil, it prefers partial to full shade and benefits from regular watering during dry periods. Low-maintenance and reliable, 'Sister Theresa' requires only cutting back spent stems after flowering and occasional mulching to retain soil moisture. Its nectar-rich flowers attract pollinators, enhancing both ornamental and ecological value in shaded garden spaces.