Will Peroxide Kill Plants

While a weak solution of hydrogen peroxide will kill off bacteria and fungus and leave your plants unharmed, a stronger concentration can actually be used as a weed killer. A 10% concentration will kill off unwanted plants if it is applied directly to them.

Is hydrogen peroxide harmful to plants?

So, the answer to the question, “Does hydrogen peroxide hurt plants?” is a resolute no, provided the strength is sufficiently diluted. You can purchase hydrogen peroxide in various potencies.

Can I spray my house plants with hydrogen peroxide?

Using hydrogen peroxide on your indoor houseplants operates on the same principle: It introduces additional oxygen to promote plant health. Hydrogen peroxide can also serve as an effective pesticide and fungicide. When diluted correctly, it can break down fungal tissues such as powdery mildew, writes Grow Your Yard.