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Step 1
Keep your houseplants insect-free. Many insects can infect your plants with disease. Mealybugs, aphids, fungus gnats and spidermites can contribute to fungi and viral diseases. Spray plants with an insecticide that is safe for plants.
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Step 2
Use pasteurized soil when potting houseplants. When repotting, always use clean gardening tools and clean each pot thoroughly before potting the new plants to reduce the risk of disease.
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Step 3
Avoid overwatering thr houseplants. Too much water can lead to root rot or to the growth of fungus. Make sure the pot drains adequately. Always stick your finger into the soil to check before watering; if the soil is damp, the plant does not need water.
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Step 4
Place new houseplants away from other houseplants until you are sure it is disease-free. Infectious diseases can spread if the sick plant is put too close to healthy plants.
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Step 5
Prevent fungal diseases by spraying your plants with a fungicide. A non-toxic, organic fungicide will work best, as this spray is harmless and non-irritating to people as well as to the plant's leaves and blooms.
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Step 6
Supply proper growing conditions for your houseplant. Give it plenty of sunlight, proper and well-ventilated soil, plant food, adequate water (not too much or too little), avoid overcrowding if you have many plants and keep leaves trimmed and dust-free.
