Clearance Rose Bushes with Black Stems and Spots: Black Spot and Canker

Recently bought clearance roses have black stems, yellow/black-spotted leaves, drying foliage. Two are tree roses.

Problems

• Black spot (fungal): yellow leaves with black spots.
• Canker (fungal): black stems.

Rescue Attempt

• Prune dead/dying wood to healthy tissue.
• Destroy debris away from plants.
• Spray with Bayer Advanced Rose Spray (fungicide + insecticide).
• No guarantee; clearance plants often too far gone.

Tree roses need same care.