There are a lot of questions about H2O2 with few good answers.
I would like to spray my leaves of my outdoor plants after a wet two weeks of wet and damp weather. This would be preventative because I had some PM last year.
The problem is that a lot of places say something like "solutions of hydrogen peroxide
(9 parts water to 1 part hydrogen peroxide)."
BUT - they do not say what the starting concentration is for the H2O2. I might assume starting with a 3% solution taking it down to a 0.3% solution to spray on leaves.
For leaves, some places say
A. "one cup 3% hydrogen peroxide per gallon of water."
B. "1 tablespoon of hydrogen peroxide for every 1 cup of water "
C. "1 teaspoon of 3 percent hydrogen peroxide to every 1 cup of water. "
For roots
D. "1 pint of 3 peroxide hydrogen peroxide for every 1 gallon of water"
Standardizing units
One US gallon = 3.8 litres
One Pint = 0.47 litres
One Cup = 0.23 litres
One Tablespoon = 0.015 litres
One Teaspoon = 0.005 litres
A. = 0.23 / 3.8 = 0.0018 %
B. = 0.15 / 0.23 = 0.02 %
C. = 0.005 / 0.23 = 0.00065 %
D. = 0.47 / 3.8 = 0.124%
Have I made any mistakes?
Note for the Americans: The USA is officially a metric country but no one cares to use metric.
This place says it is OK to use a 3% solution to spray leaves
use hydrogen peroxide as an insecticide or insect repellent, make a 1% dilution.
Hydrogen Peroxide Foliar Spray for Growing Cannabis - how to use hydrogen peroxide in various forms, including as a foliar spray, to grow healthier, more prolific and abundant cannabis.
beginnergrowguide.com
Why is there no stadard advice such as
Leaf spray = 0.3%
Root watering = 0.1 %
- or something like that?
More info
Hydrogen peroxide for indoor plants is a popular treatment used by gardeners. It can be...
homeguides.sfgate.com
Find out how you can improve plant care with hydrogen peroxide. Then get tips on the best ways to dilute and apply hydrogen peroxide when gardening.
www.backyardboss.net
Hydrogen Peroxide for plants and the garden has numerous uses, as a soil drench, treating root rot, sterilize soil and battle powdery mildew. [LEARN MORE]
plantcaretoday.com
Hydrogen peroxide for indoor plants is a popular treatment used by gardeners. It can be...
homeguides.sfgate.com