EC is relative to growth conditions, In commercial grows they will push all the way to 4.0+ by adding CO2 and intense lighting etc. I use Jacks with some supplemental CO2, under normal recommend mix concentrations my EC is typically between 1.97 - 2.01, my last few grows I was able to push by +50% to bring my EC to around 2.97. the buds were more dense and they seem to have mature faster IMHO.
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