Rose Black Spot: Sulfur First, Then Fungicide

Existing black spot: liquid sulfur spray first (great preventive + mild curative). If fails → systemic fungicide (myclobutanil, propiconazole).

Program

1. Sulfur weekly until clean.
2. Then fungicide rotation for prevention.
3. Baking soda = chemical too (sodium bicarbonate).

Key

Sulfur is cheap, effective, low-toxicity. Start there.