Dr. Who
Well-Known Member
Your running different strains in one space and feeding them like they are the same.
The one with the issues is a high sativa mix or an outright sativa...
The ones with the "purple" coloring - Look to be from strain genetic traits. Could be a night time cooling factore in there also. Temps that change over 10 deg. lights on to lights off. Tend to express coloring more in late bloom. Ypu can increase that effect by letting it get cooler at "night" by a 15 degree drop....
The sativa leaning plants have an issue with Ca. This could be related to a pH issue for that plant(s).
Strains have differing needs. Some like more Mg, some like more N, etc, etc.
I suspect the difference is related to that first. Learning how to "dial in" a strain is something you need to learn to get to the next level.
As for AN lines. I am NOT a fan of Advanced Nutrients!
To many claims, promises that are NOT related to their nute lines... They go about business in a very shady, money grabbing way...