Persistent Black Spot on Carpet Roses Despite Spraying

Carpet roses are black spot magnets. Even with weekly fungicide, spores reinfect from air and soil. Spray the soil surface and mulch around the base—spores overwinter there. Continue spraying every 7 days; add a spreader-sticker for better coverage.

Long-Term Strategies

• Switch to resistant varieties (e.g., ‘Drift’, ‘Easy Elegance’ series).
• Ensure full sun, good airflow, drip irrigation.
• Remove all leaves in fall; replace mulch.
• Accept some spotting—carpet roses tolerate it and keep blooming.

Black spot won’t kill the plant; it’s cosmetic. Focus on plant vigor over perfection.