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Hybrid Tea Rose Bud Failure: Soil, Roots, or Chemical Drift

New growth blackening/dying suggests soil/root issue, not insects (insecticide would kill them). Check for root galls, water deeply in heat, consider neighbor's herbicide drift or contaminated mulch. Test by hard-pruning one bush to 1 ft, fungicide spray—if it regrows healthy, repeat on others. Problem likely started weeks ago.

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