Characterization of Nutrient Disorders of Cannabis sativa - Published: 18 October 2019

The PDF attached may be the most thorough nutrient disorder guide available at this time.
"Symptoms and progressions were tracked through initial, intermediate, and advanced stages. Information in this study can be used to diagnose nutrient disorders in Cannabis sativa."

Very good, thank you for posting. As you can see here, what a lot of the ostensible experts on this site would categorize as "burn" is actually the start of potassium deficiency.

No problem. It's a great article, very informative.
Hopefully this post gains some traction so it don't get lost in the muck. (Or Pinned. I'm looking at you, @rollitup )

Observe & Report said:

Very good, thank you for posting. As you can see here, what a lot of the ostensible experts on this site would categorize as "burn" is actually the start of potassium deficiency.

Click to expand...

Also, I believe that most often when there is a potassium deficiency, it is rather a lockout due to excess nitrogen.