14 days of food is bullshit imo. when you transplant a plant into a new pot, it usually takes 2 weeks just for the roots to fill the pot in properly (and remember 1 gal of container = 1 month of growth so transplant when necessary). So my ass if that plant eats all the food included in your soil mix in 14 days. if you're watering with runoff, you're dissolving food and running it out of the soil, its called leaching. if you don't water with runoff, nutrient benefits never expire so technically if the plant didnt eat it, it didn't leave the pot. keep this in mind. I haven't researched your soil mix so i'm not sure whats in it to begin with.
Ph is ALWAYS important so keep doing it. whether it be soil or water, you can not argue chemistry. Ph is why we have ranges to strive for when growing, otherwise no one would give a shit, organics or not. nature takes care of these things on its own, plants thrive in a ph to their liking and reproduce, or barely survive and die and inhabit an area better to their liking). so ph going in correctly and check that damn run off!! I bought bluelabs soil Ph pen, and i love it. nothing better than knowing your ph is on point. then you know it's not that problem, and growing correctly is all about eliminating any problems. Sounds to me like your soil Ph is on point.
i have peat moss for the majority make of up my soil (60%) which is acidic by nature, when i got my Ph away from acidic and up to 6.5 where it should be with dolomite, i saw huge improvements in my grow. What happened is the soil i buy contains dolomite, but when i cut with worm casting and coco, not only do i "dilute" the amount of dolomite, but it dissolves over time and Ph drops. I would have this problem about 1 month after transplanting (which is ~3 wks into flower, the worst time) and magnesium would go deficient (age old is known for not having enough Mg i found out). started top dressing with dolomite and my Mg prob went away. now my plants are eating more with Ph corrected and I'm getting much larger yields. People who don't Ph are either really lucky, or really know wtf they are doing.
Now from what I read of what you're adding, 1ml per litre is less than 1 tsp per gallon, so i highly doubt you're over fertilizing them, even with chem nutrients less than a tsp per gal is not very much at all. Do you have a PPM meter? they're stupid cheap, about 18$ at the most expensive grow store price lol. do a PPM test for when you mix your nutes, and then see what the run off is when you water. THIS will tell you how much food is actually going in and coming out of your pot. if it's much more than what you put in then you have too many dissolvable solids in the soil. if it comes out the same, then your plant is eating stuff up happily and you could possibly increase the amount of food slightly. Sorry i know it's long winded, but i hope it helps you out.
