Ppm for marijuana plants


A question from a fellow grower:

What should my ppm be in flower stage for white widow and blueberry


This can vary according to what type of system, and choice of medium.

Another factor would be, your lighting. Help me out :slight_smile:

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It could depend on many different factors, what is the recommendations of the product itself and are you using r/o or tap water and what is your starting ppm in the water. Are you asking the ppm of your solution you pour on your soil? Flood and drain coco filled pot or rockwool table flood to drain or ebb and flow? Or Deep Water Culture reservoir’s ppm?