8 tips for using baking soda in the garden

Baking soda, or sodium bicarbonate, can be a versatile and useful addition to your gardening routine. Here are eight tips for using baking soda in the garden:

  1. Control Powdery Mildew:
  • Mix 1 tablespoon of baking soda, 1/2 teaspoon of liquid soap, and 1 gallon of water. Spray the solution on plants affected by powdery mildew. This mixture can help suppress the growth of the fungus.
  1. Neutralize Soil pH:
  • Baking soda can act as a mild alkaline substance, and in some cases, it can be used to raise the pH of overly acidic soil. However, it’s essential to test your soil’s pH before applying baking soda to avoid over-alkalizing.
  1. Deter Cabbage Worms:
  • Create a solution by mixing equal parts baking soda and flour. Dust the mixture on cabbage plants to deter cabbage worms. Reapply after rain.
  1. Sweeten Tomatoes:
  • Some gardeners believe that adding a small amount of baking soda around tomato plants can help sweeten the tomatoes by reducing acidity. However, this method is controversial, and it’s essential to monitor pH levels carefully.
  1. Repel Insects:
  • Sprinkle baking soda around the garden or on plants to help repel certain pests. This may be more effective against crawling insects, but it’s not a foolproof method.
  1. Clean Garden Tools:
  • Mix baking soda with water to create a paste and use it to clean garden tools. The abrasive nature of baking soda can help remove dirt, rust, and residue.
  1. Deodorize Compost Bin:
  • Sprinkle baking soda in your compost bin to help control odors. Baking soda can neutralize acidic components, reducing unpleasant smells.
  1. Clean Patio Furniture:
  • Create a mixture of baking soda and water to clean patio furniture. This can help remove dirt and stains without damaging surfaces.


  • While baking soda can be beneficial in certain situations, it’s crucial to use it judiciously and in moderation. Excessive use can impact soil pH, and not all plants respond well to alkaline conditions. Additionally, it’s essential to consider the specific needs of your plants and soil before incorporating baking soda into your gardening routine. If you have specific concerns or questions, it’s advisable to consult with a local gardening expert or extension service for personalized advice.

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