Prefers semi-shaded sites will tolerate more light in the soil is kept moist. I have a group of Astilbe in a 1/2 to 3/4 day sunspot for over 10 years and they are a showstopper when blooming. To achieve this they are growing in a bed that is raised a few inches and the soil is naturally constantly wet.
Moisture
Needs moist soil. Plants growing in dry conditions will be small, few blooms and tend to dry up during the hotter days in the summer.
Soil & Site
prefers rich, humusy moist well-drained soils, tolerates average
Flowers
soft pink plume-like inflorescences (panicles)
Leaves
dark green leaves, ternately compound, leaflets are coarsely serrated
Dimensions
18 inches tall, space 16-18 inches on center
Maintenance
Division of the clumps every 2-3 years will help to maintain the vigor of the plant. Astilbe are heavy feeders and need to be fertilized every year in the spring and also in the early fall