Pour a quart of standard 3 percent-strength hydrogen peroxide--available from most drugstores--into a gallon-sized spray bottle. Jan 17, 2019 #21 NewbyGrower77 said: Hi , This was my 4th grow. All i have been doing is applying it to the soil every 2nd day by just pouring it into the soil and a foliar spray every day. And, even more satisfying to have, hydrogen peroxide does not have an offensive odor that often associates with hazardous chemical elements. I am living in a island. Hydrogen peroxide is a simple, cheap and amazingly effective anti-bacterial and anti-fungal agent, although it is not registered or labeled for this use. Here people lives around 40,000 its a remote area...we are poor.. 60 and a foliar treatment for field grown crops, crops grown in commercial greenhouses or crops grown in 61 other similar sites (BioSafe, 2010). 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 … Hydrogen peroxide will clean our space with its aggressive antimicrobial efficacy without scarifying our own health. Then I spray with regular water until the hydrogen peroxide solution is completely washed away. Thread starter Tinker Greenly; Start date Nov 9, 2010; Prev. Foliar Diseases. They may lose some flavor buy are still dank and it doesn’t wash away any of the thc at least. Hydrogen Peroxide Foliar Spray. The 3% strength version sold in drug and grocery stores can be used full strength on your plants. 1; 2; First Prev 2 of 2 Go to page. Add three quarts of water and shake the spray bottle to mix its contents thoroughly. Go. Kingrow1 Well-Known Member. I even happy with the results and just repeat about every other week or as necessary. It is okay to use more water and/or less peroxide. If you're using a bigger or smaller bottle, adjust the measurements so you're mixing one part hydrogen peroxide and three parts water. I think it’s probably a safe efficient way to clean the plants. I give the plant about a cupfull of 3% solution as the soil dries out very fast when i have it outside in the heat about 70 farenheit. Search around for the 8 oz (237 ml) spray bottle of hydrogen peroxide and keep it handy in your growing area. This kills the PM and washes most of it away.