No shade garden is complete without astilbe. These rugged perennials thrive in moist shade, providing you with a summers worth of big, bold, frilly flower heads. And even when not in bloom, the plants mounded, fernlike foliage is worth the price of admission. Heights vary by variety but most types grow 2-3 feet tall. Astilbe flowers come in white, red, pink, orange, and violet, and generally start to appear in late spring and early summer. They thrive in a rich, loose, organic soil. Zones …



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