It's a touchy subject. Most of the internet and the forum disagree with me. But relying on soil to buffer PH is not a good approach to growing anything in my opinion. Especially not your prized plant.
Sure if you have lots of living soil it will buffer... up to a point. This is why I see so many late flower ph issues.
When I worked on an organic produce farm my boss paid attention to the soil PH and the PH of what was going in. He would compensate for the PH of the rain by adjusting the ammemdmemts in the soil.
This is beyond my skill set. Adjusting the PH of what goes in is easy and does not kill micro life.
Compost tea should have a neutral PH. Microbes grow best in a neutral PH. My compost tea has a PH of 8.4 Lemon juice brings it to a 6.8 where microbes can grow and my plant can utilize.
When taking the water only approach to organic growing PH is still important. If your water is above 7 then over time the soil will eventually raise to over 7.
For water only growing i use fresh squeezed lemon to lower the water to a 6.4. I no longer see the late growth PH issues.
Go easy on me.
Cheers Talkers.
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