Yarrow, scientifically known as Achillea millefolium, is a flowering herbaceous perennial plant native to Europe and Asia. Here are some key points about yarrow:

1. Appearance: Yarrow plants typically feature fern-like, finely divided foliage that gives them a delicate appearance. The leaves are aromatic when crushed. Yarrow produces flat-topped clusters of small, daisy-like flowers that come in a variety of colors, including white, yellow, pink, and red. The flowers are often visited by pollinators such as bees and butterflies.

2. Size: Yarrow plants vary in size depending on the species and cultivar, but they generally grow to a height of 10 to 12 inches and spread to form clumps.

3. Blooming Season: Yarrow blooms from late spring to late summer, depending on the species and growing conditions. Deadheading spent flowers can encourage continuous blooming throughout the season.

4. Sun and Soil Requirements: Yarrow prefers full sun and well-drained soil. It is tolerant of poor, dry soils and can thrive in rocky or sandy conditions. Once established, yarrow is drought-tolerant and requires minimal water.

5. Watering and Maintenance: Yarrow is a low-maintenance plant that requires little care once established. Watering is generally only necessary during prolonged periods of drought. Yarrow can spread aggressively in ideal conditions, so dividing clumps every few years can help control its growth.

6. Landscape Use: Yarrow is a versatile plant that is commonly used in perennial borders, wildflower gardens, and cottage gardens. Its attractive flowers and fern-like foliage add texture and color to the landscape. Yarrow is also used for its medicinal properties and is sometimes grown as a companion plant to attract beneficial insects.

Overall, yarrow is valued for its attractive flowers, drought tolerance, and ease of care. It is a popular choice for gardeners seeking a low-maintenance perennial that provides long-lasting color and attracts pollinators to the garden.