I watered some young plants with a ppm of 500 ph 6.3 I knew it was high but thought they were fine the first few days. I gave them to water a few days later and then this happened…. I did a light flush and the runoff was 5.7 and around 300 ppm. I don’t know how the ph of soil got so low. I appreciate anyone who’s willing to help.
Someone help me identify the problem
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hotrodharley
Well-Known Member
“Typically the pH of an unused PRO-MIX product that is 4-9 months old is 5.2-5.8(S.M.E. method), depending on the product and the moisture content. A growing medium should be used within nine to twelve months of its manufacturing date to ensure that the pH of the unused growing medium is not too high.”
Herb & Suds
Well-Known Member
Letting the medium get to dry can cause that especially with high feed levels