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Gardeners Can Use 1 Trusty Household Item to Help Struggling Plants This Autumn
- Gardeners use a baking soda spray, mixed with water and horticultural oil, to prevent fungal infections on plants as of October 5, 2025.
- Experts recommend this spray because fungal diseases like powdery mildew can severely damage plants, but baking soda should never be applied directly to soil due to alkalinity risks.
- The spray is usually made by mixing about one teaspoon of baking soda into 500ml to one quart of water, with a small amount of gentle dish soap or horticultural oil added to improve adherence on plant leaves.
- Richard Barker warns that overusing the spray can cause foliage scorch and sodium buildup, and Chris Taylor confirms it controls symptoms but does not kill fungal spores.
- Reapplying the spray after rain or irrigation optimizes effectiveness, and gardeners should apply it sparingly, using it mainly as a preventive treatment at early infection signs.
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