How to Use H202 for Root Rot
H2O2, or hydrogen peroxide, is known for its sterilizing and cleaning properties. But it can also release oxygen that makes it an effective tool to combat root rot. Roots require oxygen to breathe, and when they are over-watered or planted in soil with poor drainage, they develop root rot. When you water your plants with H202, it releases oxygen into the soil around the roots so that they can breathe again.
Fill your watering can with half H202 and half water.
Add an anti-fungicide like benomyl (follow the manufacturer's instructions for the amount of water that you are using).
Add a fertilizer with rooting hormone like Root Booster to the soil (follow the manufacturer's instructions for the amount of water that you are using).
Water the plant heavily with the H202 solution. Do not stop until water comes pouring out of the drainage holes in the pot. Then empty the drainage tray. Do not water the plant again until the top two inches of the soil are dry.
Continue to water your plants as usual, using a solution that is half peroxide and half water.
Discontinue using the peroxide solution when your plants perk back up.
Combat Root Rot
Remove the plant from the soil and gently wash away dirt. Plants with roots that have been totally infected should be discarded. Clip dead or infected roots with root trimmers. Rinse trimmers in a solution of one part bleach to nine parts water when finished. Check plants for root rot in gardens where root rot has become a problem. Water only as needed and not more than necessary. Plant in soil with adequate drainage. Fill the hole again, then measure the depth of the water in the hole with a ruler. If the water has receded less than 1 inch, then the soil has poor drainage.
- 3% H202
- Watering can
- Anti-fungicide (benomyl)
- Fertilizer with rooting hormone (Root Booster)
- Quick Grow South: Hydrogen Peroxide and Horticulture
- University of Rhode Island Landscape Horticulture Program: African Violets
- Simply Hydro: Root Rot
- University of California Agriculture and Natural Resources: Pests in Gardens and Landscapes
- University of Minnisota Extension: Root Rot of House Plants