Root Rot (Armillaria)

Armillaria root rot affects many plants in the Pacific Northwest, causing decline and death through root decay. Remove infected plants and stumps. Improve drainage where possible. Select resistant species for affected sites. Monitor for symptoms and remove infected trees promptly. Proper drainage and good site selection are critical to prevent root disease problems. Monitor plants for early signs of decline or wilting.

Root rots thrive in waterlogged soil, so drainage is your most important intervention. Avoid overwatering and ensure the planting site drains well. Remove severely affected plants to prevent spread to neighbors through root contact or contaminated soil. When replanting, choose resistant species or improve soil structure before putting anything back in the ground.