Hello All,
I have a client in commercial Colorado with the same issue. Turns out Bruce Banner requires a high amount of calcium/magnesium/Nitrogen in the veg stage. The fix was about twice as much (5ml of
calmag per gallon instead of 2.5) and above average (a little less than double) nitrogen added. After about 2 days, they were all back to healthy plants. In researching this issue, 90% of people look at it and say it’s an over water issue. Which it looks very similar. It is just a sensitive strain that requires some extra TLC. I have seen on other forums where it happens in flower as well but does not require as much as double to fix it. Client was still in veg stage. Hope this helps!