Wisteria Recurrent Dieback: Root Disease in Established Vine

10-year-old wisteria on patio trellis yellowed, died back, cut to ground, roots healthy with green shoots, regrew vigorously, bloomed, now sudden yellowing/wilting on several branches again. Nursery stumped.

Diagnosis

Soil/root disease—opportunistic pathogens attack when plant stressed. Original stressor unknown. Objective: maintain vigorous growth to resist attack.

Management

Consider fresh start with healthy plant in well-drained soil. Water carefully—clay soils cause waterlogging. Wisteria prefers good drainage.

Watering Confusion

Conflicting advice: drought-tolerant vs. evenly moist. Go light on water once established. Sand=dry fast, clay=holds water. Avoid "wet feet."