Your search for astilbe found the following advice articles...

Planting a Shade Garden

All About Astilbes

Considering Winter Conditions While Planting

Plants for Shade Locations

Seaside Plants

Plants for Wet Locations

Spring Blooming Perennials for Shade

Dazzling Foliage Carries the Show!

Celebrate the 4th with Red, White and Blue Flowers

Steep Slopes and Erosion Control

Plants for Clay and Moist Soils

Hardy to Zone 3

Divide and Conquer! How to Divide Perennials

Incorporating Hardy Plants in Containers

Add Color Next Spring With Flowering Bulbs

Shady Characters: Awesome Astilbes

Cut Flowers