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‘Amethyst’ is noted for its lilac-purple flowers. It typically forms a foliage mound to 12-24” tall with panicles of fluffy lilac-purple flowers appearing on upright stems rising to 30-36” tall.


Arendsii hybrids are a large group of hybrids involving crosses between A. chinensis, A. japonica, A. thunbergii and A. astilboides and named after German nurseryman George Arends (1862-1952).


Sun Exposure:  part sun to part shade will tolerate full sun if in soil that stays evenly moist (not soggy), may not flower well in full shade.

Soil type:  rich in organic matter

Soil PH:  acidic or neutral

Soil Moisture: Moist does not tolerate drying out

Care level:  Easy  (keep them looking good with annual shovel fulls of nutrient rich compost)

Flower color: mauve lilac

Bloom time: early to mid summer

Foliage Color: deep green

Uses and Characteristics:  Borders,  Containers ,attracts butterflies,  specimen, cut flower, Massed, Deer and Rabbit Resistant, Shade gardens, waterside

Flower head size: Large

Height:  30-36”

Spread:  18-20”

Growth Rate: Medium.

Propagation:  By division. In spring.  The plants benefit from division every 3-5 years.

Astilbe x Arendsii ‘Amethyst’  Zones 3-8