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Powdery Mildew on Indoor Mini Rose: Isolation, Environment, and Baking Soda Spray

Symptoms & Spread

Gray-white powder on leaves, worsening over weeks. Isolate from other plants (African violet, bamboo, passion vine). Mildew thrives in warm days, cool nights, high humidity—typical indoors.

Cultural Fixes

Reduce watering (water when soil dry 1/2 in deep). Move outdoors when warm, acclimating slowly to avoid sun scald. Better air and light cures mildew.

Organic Sprays

Baking soda spray (1 tbsp soda + 2.5 tbsp oil + 1 gal water + 0.5 tsp castile soap) every 5–7 days. Neem oil, horticultural oil, potassium bicarbonate also work. Hose leaves first.

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