Purple stems?

Any experience with purplish stems?

LongsPeakstate said:

Any experience with purplish stems?

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Cool temps can cause P deficiency. Or it could be P deficiency alone, or it could be genetics.

I personally noticed that I get purple stems on the side where the light has been hitting the stem. I also noticed that on the other side of the leaf/stem is green. I'm pretty sure it is a stress response and is normal, especially with the high light intensity of LEDs.

Check your nutrient regimen for phosphorous content. If the phosphorous is below 80 mg/l then you should up it.