Plant Profile: Achillea filipendulina

Achillea filipendulina, commonly known as a type of yarrow, is a flowering herbaceous perennial belonging to the sunflower family. This species is indigenous to central and southwestern Asia, but it has also become established in various regions of Europe and North America. It thrives in average garden soils and can tolerate less-than-ideal conditions, provided there is good drainage. However, it is best to avoid heavy clay and overly rich, moist soils. This plant can withstand hot, humid summers and some drought, showing moderate salt tolerance. For optimal growth, it should be placed in areas shielded from strong winds. To encourage further blooming, it is advisable to deadhead spent flowers back to lateral buds. After flowering, cutting the plants back to their basal leaves helps maintain a tidy appearance and may promote additional blooms in the fall. Clumps should be divided every three to four years when they become overcrowded, as overly enriched and moist soil can lead to leggy growth.

This particular variety of yarrow is among the tallest, featuring long-lasting blooms that are excellent for cutting or drying, with the dried flowers capable of lasting for years.

The foliage of Achillea filipendulina is characterized by its green, fern-like texture and a strong, spicy fragrance, forming an appealing basal clump. Throughout the summer, it produces tiny, vibrant golden flowers—comprising yellow rays and discs—arranged in dense, flattened, plate-like compound corymbs that can reach up to 4 inches across. These flowers bloom on sturdy, erect stems that can grow to heights of 3 to 4 feet, which may require staking for additional support.

In terms of pests and diseases, potential issues include stem rot, powdery mildew, and rust, with overwatering posing a risk for root rot.