Goat's Beard (Astilbe)

Astilbe is a genus of rhizomatous, herbaceous perennials grown for upright plumes of small flowers and divided foliage. Species and cultivars vary in height, flower color, bloom timing, and light tolerance, with selections for shaded gardens and moist soil. ## Landscape Use and Seasonal Interest Astilbes are commonly used in shaded borders, woodland gardens, and moist planting areas. Their plumes range from airy to dense and may be white, pink, red, or purple; dried flower heads can remain ornamental into winter. The [RHS genus guide](https://www.rhs.org.uk/plants/astilbe?type=0) notes that compact selections can also be grown in containers, while [Iowa State University Extension](https://yardandgarden.extension.iastate.edu/how-to/growing-astilbe-iowa) describes wide differences in cultivar height and flowering time. ## Siting and Soil Light shade and moisture-retentive, organic-rich soil suit many astilbes. They can tolerate sunnier sites where soil remains damp, but dry soil and hot sun can scorch foliage. Do not infer that a genus-level listing tolerates standing water: specific cultivars and species need appropriate drainage. ## Maintenance Keep the root zone evenly moist, especially during summer. Leave faded plumes for autumn and winter texture, then cut old stems to the ground before spring growth. Divide established clumps every few years if flowering declines or the planting becomes crowded, following the [RHS growing guide](https://www.rhs.org.uk/plants/astilbe/growing-guide).