How often to use Garden Uses For Hydrogen Peroxide: Will Hydrogen Peroxide Hurt Plants
It is not mentioned how often you should spray plants for pests or to prevent fungus in the Garden Uses For Hydrogen Peroxide: Will Hydrogen Peroxide Hurt Plants article.
Certified GKH Gardening Expert
As long as the hydrogen peroxide is diluted, it should pose no harm. For fungal infections, you should do it once, then wait a week and do it again if it doesn't respond. Depending on the plant and type of fungal infection, there may be a need for a different treatment.
For bugs, you can spray the plant and the soil weekly till no more bugs.