kletus
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Any clue? I know there is probably 100 different things. The leaves look ok but the stems are a purplish colorView attachment ImageUploadedByTapatalk1442265304.490137.jpg
The pH is a little low. It depends on what medium style grow you are doing but for any of them, you don't want the pH to get below 5.4 for any length of time. In hydro grows, its not a problem and even beneficial for the pH to drift across the spectrum of the acceptable pH range. In organics or synthetically fed "natural soil" It works best to have the pH stay around the 6.5pH area. If in hydro style grow or "soilless medium", the pH should stay around 5.8 to get best results.
If you are growing in organic or "natural soil", then the pH of 5.4 is a significant problem, and I would recommend that you get some dolomite lime to mix into the soil. I have seen a friend's plants get purple stems when he was growing in FFOF soil, and when he applied the lime it went away. However, it is quite possible for it to be a genetic trait if the strain is a "blue" or "purple" strain.
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