Astilbe Delft Lace is a deciduous, rhizomatous perennial that forms a substantial mound about 60 to 90 cm high and 45 to 60 cm wide. Its deeply divided, finely toothed foliage is dark blue-green, often flushed burgundy-purple in spring, and carried on red leaf stems. Sturdy red flowering stems rise in summer with dense yet airy plumes. Salmon-pink buds open to soft apricot-pink and darker pink flowers. The fragrant panicles attract bees, remain decorative while fading, and can be cut fresh or dried.
Grow Delft Lace in fertile humus-rich soil that stays moist but drains freely, preferably in partial shade or dappled light. It suits cottage borders, woodland edges, sheltered city gardens, mass plantings, waterside beds, and large outdoor containers. Water consistently, especially in sunnier positions, and mulch lightly with mature compost to conserve moisture. Divide crowded clumps every few years, retaining vigorous outer rhizomes. Spent plumes may be removed or left for autumn structure. Vine weevil and powdery mildew are possible problems, while dry soil and strong sun can scorch the foliage.