I wouldn't apply it at all. What are you trying to accomplish?
To help with root rot and to provide oxygen to the soil and plants as well as to fight off the fungus on the leaves mostly
PlantingOaks said:I absolutely use hydrogen peroxide in my seed starting trays - to keep the algae down in the watering system mostly, though it supposedly also helps with damping off?
I've never heard of it recommended outdoors though. How reliable was the source you learned this from?
BigBill said:Are you kidding me? That is a good deal of assumptions on your part. You are going to water in hydrogen peroxide at a 4 to 5% concentration just in an attempt to avoid a possible problem?!?!?!
Why not just grow better plants in good soil under the right conditions and then deal with any issue that might arise.
What will you do if hydrogen peroxide at that concentration does irreparable harm to your plant instead?
Have you ever grown a tomato???
I've used hydrogen peroxide in the past and my friend has too with good success. They say it's the same as Rainwater and it helps with aeration of the soil . I've read on this a hundred different times and I always read the same results. It's supposed to kill fungus and diseases on contact. Maybe I'm just doing things wrong. And I've grown tomatoes for 15 years
Baja_Costero said:Why not try growing 2 tomato plants side by side, one with peroxide and the other without, before you commit to adding it to all your plants. Peroxide is not a miracle cure and it definitely doesn't make tap water the same as rain water. Tap water will most likely have more dissolved salt (not reversed by peroxide) and it will likely be more alkaline (esp. If it's groundwater). I would argue (based on some experience with plants other than tomatoes) that acidifying tap water will make a bigger difference for growth, speaking of the various ways it may be different from rain water. And my view of aeration in the soil is that you accomplish this by choosing the right soil mix and container, and maintaining a proper wet-dry cycle when watering.
BigBill said:Who said it is like rainwater? Are you talking about acid rain?
In order for you to have acid rain of any consequence, you need to be like 500 or so miles down wind from a huge industrial center spewing all kinds of smoke and chemicals into the air.
Then the rains washed these chemicals out of the air causing acid rain. What huge industrial center are you downwind from?
The NE had dozens of lakes destroyed by acid rain in the Adirondack mountains because they were downwind from the huge steel mills and industrial centers of Ohio Michigan and Pennsylvania.
And acid rain was a very bad thing so why do you want to recreate acid rain for your plants.
I guess I will not use the hydrogen peroxide but thank you for all your help