I have just switched to Jacks 321 after using GH Flora for a few years. Coco, DTW, fertigations x 3 daily, fulvic, humic, kelp, yucca.
The main reason I have switched, is because I was getting excess N showing in the form of "claw" in every grow, typically early-mid flowering with GH Flora. Yes, I stopped using the green jug at the flip, to little effect.
Having said that, I grow 2 different strains in the tent, all getting the same nute mix, and of course, there is even a notable difference between strain pheno's and their N up-take. Some strains and phenos do not show N excess but yet others do. There is always at least 1 plant in four that do.
BTW, never have I gone beyond an EC of 1.2 and rarely do I go past an EC of 0.9 for the entire period.
Anyway, I have switched to Jacks now, at early-mid flowering.
What is the best way to decrease N when using Jacks 321? Drop the over all EC while keeping the Part A, B and epsom ratio's the same? Or decrease just the Part B?
Again, my total EC is under 1.0 with Jacks and is likely closer to 0.9 with the Part A, B and epsom at Jacks recommended ratio.