Kalimeris pinnatifida, commonly known as double Japanese aster, is a perennial herbaceous plant native to grasslands, open woodlands, and meadows in East Asia, particularly in Korea and Japan. It typically grows to a height of 1-2 feet (30-60 cm) and a similar width, with a mounded form. This plant is characterized by its deeply lobed leaves and daisy-like flowers, which are usually a soft lavender to white in color and bloom from mid-summer to early fall. The double-flowered cultivars are particularly showy, with numerous layered petals that create a fuller appearance.

Double Japanese aster is appreciated for its long blooming period and its ability to add a light, airy texture to garden borders and flower beds. It is relatively low maintenance, drought-tolerant once established, and can thrive in a variety of soil conditions, though it prefers well-drained soil. It is suitable for full sun to part shade and is often used in cottage gardens, as a border plant, or in naturalized areas. While generally pest-free, it can occasionally suffer from powdery mildew in humid conditions. Deadheading spent flowers can encourage a longer blooming season, and division every few years can help maintain its vigor.CC BY-SA 4.0