Who would have thought that hydrogen peroxide in the garden has a TON of different uses. Here are 7 ways to use hydrogen peroxide in the garden.
Uses Against Root Rot
Overwatering is the root of root rot. Water it completely with 3% peroxide mixed in with 1 quart of water. After this, don’t water the plant until the top few inches of the soil dries out.
Faster Seed Germination
Seeds will definitely germinate more quickly with the help of peroxide! Soak seeds for 30 minutes in a mixture of 3% peroxide and water. Rinse seeds immediately after.
Keep Mold and Mildew Away
Hydrogen can be used as an anti fungal treatment. Mix 1 cup of peroxide with 1 cup of water and mist over the affected plants.
Fertilizer
Use hydrogen to help strengthen the roots of your plants. Mix about 1 teaspoon of Hydrogen peroxide with 1 gallon of water.
For Pests
Mix a liter of water with 10 tablespoons of 3% peroxide. Spray this solution on plants daily to get rid of bugs that munch! 
Repotting Plants
Repotting plants with a few teaspoons of peroxide will give your garden a fresh start and a new life.
Weeds
The arch nemesis of your yard is gone for good with some hydrogen peroxide spray. Mix one to one with water.
All the ideas are fantastic!
How much peroxide for root rot