Astilbe Dormancy: When to Cut Back and How to Prevent Summer Decline

Astilbes are shade-loving perennials prized for their feathery plumes in early summer. By late summer, it's perfectly normal for foliage to brown and plants to enter dormancy—they'll return vigorously next spring.

Seasonal Care

• Cut back dead foliage to the ground in fall or late winter to maintain garden sanitation and reduce disease carryover.
• Moisture is critical: Astilbes demand consistently moist soil. If the ground dries out, plants decline rapidly and may not recover. Mulch heavily and water during dry spells.

Key Takeaway

Browning in late summer is not death—it's dormancy. Ensure even moisture year-round, and your astilbes will reward you with lush growth and spectacular blooms each spring.