krueger100
Member
Just want to let everybody in on a common misconception i discovered while looking up plant nutes. I, and i'm sure most of you all thought when combining NPK values of nutes you just add then ex. equal parts 1-15-0 & 3-6-6 would equal 4-21-6. But actually NPK values are measured as a percentage (parts per hundred) by weight, which means you would actually end up averaging the values to get an accurate combined calculation. For example, if you mix 100 grams each of 1-15-0 and 3-6-6 you would not end up with 200 grams of 4-21-6 (8 grams of N, 42 grams of P & 12 grams of K), but actually 200 grams of 2-11-3 (4 grams of N, 22 grams of P, and 6 grams of K)