Plant Profile: Sorbaria sorbifolia

Sorbaria sorbifolia, commonly known as False Spirea, is a deciduous shrub characterized by its upright, multi-stemmed growth habit. This plant thrives in well-drained soil that is average in moisture and rich in organic matter. For optimal flowering, it should be positioned in full sunlight. False Spirea can spread vigorously through root suckers, forming dense colonies, so it’s important to promptly remove these suckers to manage its growth. Pruning should be done in late winter or early spring, prior to the emergence of new shoots. If the plant appears worn out, cutting it back close to the ground can help rejuvenate it. A notable cultivar, Ural Spirea, lacks the invasive tendencies of its parent species, making it a more suitable choice for home gardens.

This robust shrub typically reaches heights of 5 to 8 feet, occasionally growing up to 10 feet, and can spread equally wide. In early summer, it produces abundant clusters of small white flowers, while its deep green leaves bear a resemblance to those of mountain ash, with which it shares a botanical relationship. It is often utilized in large plantings for erosion control.

Regarding pests and diseases, False Spirea does not face significant issues. However, it can aggressively propagate through root suckers, especially in loose soil, though it tends to be less invasive in heavier clay soils.