Hydrogen Peroxide should be used on Plants and Garden based on the need. Hydrogen Peroxide has many benefits such as disinfecting growing medium, sanitizing equipment, treat soil, however hydrogen peroxide does kill all the microbes in the soil. Balanced Micro Organism activity is very important in the soil and garden. So, only use hydrogen peroxide when there is a need such as pests in the soil, anaerobic reaction in the soil, or disease or fungi in the soil. Anything used in excess is harmful. Use hydrogen peroxide on plants and garden like a medicine.