I probably have a very simple question. Here's some background info.
My Amish friend has some babies in 16oz keg cups, they look great, and are still in the "seedling" stage of life. All is well, however, when watering with RO water, adjusted to 6.8, (and even down to 6.7) the ph of the runoff still comes out at roughly 7.2-7.28? The soil is foxfarm lightwarrior, and the very bottom inch or two is solid perlite. (Hoping to aide drainage although the fflw is very light and seems pretty excellent).
After 3 waterings, nothing added to the RO except the ph down, the runoff is consistently coming out at the prior mentioned levels. Why? Does perlite have that kind of impact on ph? Is it the soil itself?
Considering that the runoff is 7.2ish, that's about a .5 point spread, which I guess means the soil ph is roughly at 7.0ish?
So should the RO water be adjusted down to 6.5ish to reach the desired soil ph, is this over thinking at this stage of the game? Or should they continue to be watered with ph adjusted RO to 6.7 6.8ish. My guess was that the perlite in the bottom was directly causing the runoff to come out higher than it actually is in the soil itself, in which case I am thinking that I should keep that in the back of the brain. Does this make any sense, a little advice, experience would be greatly appreciated. In the mean time I will continue to search the boards.:jointsmile:
8182KSKUSH Reviewed by 8182KSKUSH on . How does perlite effect PH? I probably have a very simple question. Here's some background info. My Amish friend has some babies in 16oz keg cups, they look great, and are still in the "seedling" stage of life. All is well, however, when watering with RO water, adjusted to 6.8, (and even down to 6.7) the ph of the runoff still comes out at roughly 7.2-7.28? The soil is foxfarm lightwarrior, and the very bottom inch or two is solid perlite. (Hoping to aide drainage although the fflw is very light and seems pretty Rating: 5