this is my first time running this regimen...so i have no basis for comparison. this is also my first time mixing my own nutes, and first time running soiless outside. my colas are filling in now...i'll let you know how dense they are when they're done.
what is it about KNO3 that makes buds loose? do you use ammonium earlier in flower?
i just ran ripe in hydro buddy with potassium sulphate, and no potassium nitrate. i get 69-151-229-85-35. the only difference is calcium goes up about 13 ppm. there's the same ppm of nitrates...so what's going on here that makes harder buds?
mejuana: purity has to do with whether or not a salt is cut with an adulterant. Pure MKP is 0-52-34. 100g of pure MKP contains 52g P (really P2O5).
shooting powder is 0-39-25. 100g of
shooting powder has 39g P. 39/52 = 75% pure. does that make sense?
edit: epsom salts is magnesium sulphate heptahydrate. it is 9.86% magnesium. wiki is handy for molar masses.