Question:
Why do my yellow roses always get black spot disease despite using fungicide controls on them?
Answer:
Yellow roses are genetically prone to black spot because most carry ancestry from Rosa foetida persiana, an early yellow rose that naturally harbours susceptibility to the disease. Fungicides help but they can’t fully overcome this inherited weakness. To reduce infections, choose disease-resistant yellow hybrids, such as 'Graham Thomas' or 'Golden Celebration', prune for good airflow, water at the base and remove infected leaves promptly. With the right care, even ‘sensitive’ yellow roses can thrive beautifully.
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