The Q&A Archives: Soil Sterilization for Potting Plants

Question: At what temperature and for how many minutes do I set my oven to sterilize my potting soil?

Answer: Although soiless, sterile potting mediums are available, some gardeners still prefer to sterilize and use their own soil for potting. Spread lightly moist soil on an overproof tray and cover with aluminum foil. Bake at 180 degrees F. for 40 to 45 minutes. An unpleasant odor is natural.

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