Mixing charts for gardening with hydrogen peroxide
If you want to start gardening with hydrogen peroxide, you need to know how much peroxide to use. Here are charts to tell you how much!
To water or mist plants, to soak seeds, to add to water used to wash sprouts:
| TO THIS AMOUNT OF WATER | ADD THIS AMOUNT OF 3% HYDROGEN PEROXIDE | --OR-- ADD THIS AMOUNT OF 35% HYDROGEN PEROXIDE |
| 1 cup | 1 and 1/2 teaspoons | 7 to 10 drops |
| 1 quart | 2 tablespoons | 1/2 teaspoon |
| 1 gallon | 1/2 cup | 2 teaspoons |
| 5 gallons | 2 and 1/2 cups | 3 tablespoons plus 1 teaspoon |
| 10 gallons | 5 cups | 6 tablespoons plus 2 teaspoons |
| 20 gallons | 10 cups | 3/4 cup plus 1 tablespoon plus 1 teaspoon |
| bathtub (aprox 25 to 35 gallons) * | 12 to 17 cups | 1 to 1.5 cups |
* bathtub sizes vary. It is okay to use more water and/or less peroxide.
To spray on sick or fungusy plants:
| TO THIS AMOUNT OF WATER | ADD THIS AMOUNT OF 3% HYDROGEN PEROXIDE | --OR-- ADD THIS AMOUNT OF 35% HYDROGEN PEROXIDE |
| 1 cup | 1 tablespoon | 1/4 teaspoon |
| 1 pint | 2 tablespoons | 1/2 teaspoon |
| 1 quart | 1/4 cup | 1 teaspoon |
| 1 gallon | 1 cup | 1 tablespoon plus 1 teaspoon |
| 5 gallons | 5 cups | 6 tablespoons plus 2 teaspoons |
| 10 gallons | 10 cups | 3/4 cup plus 1 tablespoons plus 1 teaspoons |
| 20 gallons | 20 cups | 1 and 1/2 cups plus 2 tablespoons plus 2 teaspoons |
Please be mindful to choose the correct column in the chart depending on whether you are using 3% hydrogen peroxide or 35% hydrogen peroxide!!
As you may notice, the amount of peroxide in the chart for sick and fungusy plants is twice as much as in the first chart. I have heard of people using stronger solutions, but more is NOT always better. So be careful, and when in doubt, stay safe. You can always apply more another day. If you decide to use a bit more, please make it only a bit more, don't get carried away. Gardening with hydrogen peroxide is great, but too much can harm your plants. 10% hydrogen peroxide is recommended as a week killer -- in other words it will kill your plants at that concentration....
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