Hydrogen peroxide has an extra oxygen atom than Water. It is this extra oxygen atom that makes the hydrogen peroxide so useful for many reasons that you’re about to discover. The Hydrogen peroxide can then be used in cleaning, bleaching, sterilizing and many more. Perhaps the most interesting is how Hydrogen peroxide can be used in horticulture. In layman’s terms, Hydrogen Peroxide is essentially an oxygen supplement for plants. It works by releasing oxygen and also aerates the soil. Thanks to Balcony Garden Web for this awesome article!