Hey Carlos: Here is a site that tells you all about that!
Hi Carlos. I'm Cindy. Yes Hydrogen Peroxide is good in the garden. Just be sure to use the 3% and dilute it with water. Another item good for the garden is Epson Salt. Put a tablespoon in a gallon of water to dilute. Both methods are effective and inexpensive. Good luck Carlos.
Hi Carlos, hydrogen peroxide can help discourage unwanted bacteria/fungi that may be lurking in the garden. To give plants an added boost of oxygen or for pest control using the 3% solution, add 1 teaspoon per cup of water in a spray bottle and mist the plant. ... Mix one part hydrogen peroxide to ten parts of water.
It can be used to remove mold from plants - read about it here: https://www.hometalk.com/11300208/9-surprising-uses-for-hydrogen-peroxide