Are these leaves too yellow?

[katzenhai2]

[...]
Solutions prepared with Peters fertilizers always have an acidic character when prepared with rainwater. I adjust the pH by adding a little tap water (5 to 10%) to obtain a pH of 6.2 - 6.4. As this fertilizer contains urea, even adding city water with a nitrogen content of 50 to 65 ppm still leaves a conductivity of less than 500µS.

I thought the optimum pH range was between 5.4 and 6.4 whereas I often read that people set their water between 5.7 - 5.9.
Why do you set yours to 6.2 - 6.4?

 

[Brabantia]

I thought the optimum pH range was between 5.4 and 6.4 whereas I often read that people set their water between 5.7 - 5.9.
Why do you set yours to 6.2 - 6.4?

I adjust the pH to values between 6.2 and 6.4 for two reasons:
To combat the tendency of the substrate to acidify due to degradation
To ensure that plant roots are in an environment in which they are able to assimilate trace elements.
Ref: [https://icl-growingsolutions.com/f...nowledge-hub/how-ph-impacts-plant-nutrition/]

 

[katzenhai2]

I adjust the pH to values between 6.2 and 6.4 for two reasons:
To combat the tendency of the substrate to acidify due to degradation
To ensure that plant roots are in an environment in which they are able to assimilate trace elements.
Ref: [https://icl-growingsolutions.com/fr-fr/ornamental-horticulture/knowledge-hub/how-ph-impacts-plant-nutrition/]

Thank you. In the table in your link it doesn't seem to be that much of a difference (except maybe for phosphorus). But your first argument seems more interesting. Would be interesting to test that out to see if that has an effect at all (when using organic media).