Yellow Leaves on Potted Grandiflora Rose in Cool Climate

Investigating the Single Affected Plant

Four potted Grandifloras in Eureka, CA (max 70°F). One has many yellow leaves, no other symptoms. Pot size, drainage, mulch OK. Other roses fine.

Questions to Answer

• What fertilizer, how often?
• Overwatering? (Must dry between waterings.)
• When last repotted?

General Advice

Yellow leaf drop is a stress response: too wet, too dry, nutrient imbalance. Repot in fresh mix if overdue. Ensure wet-dry cycle. Feed with balanced organic rose fertilizer.