IMO that's bad advice. Nutrients are fertilizers. The only difference is that nutrients is a term used in hydroponics, while fertilizers is a classic term for gardening and farming. There is no such thing as a cannabis specific nutrient profile. No one has yet to prove cannabis like's 1-1-1 more then 1-2-2 or 1-3-2. They all work. Companies use marketing to make you believe they've discovered the best profile, but it's just a sales gimmick.
In fact, it was because companies lied so much to farmers back in the day, that the government put a stop to so called "snail oils" and required all fertilizer and pesticide companies to post the NPK values and ingredients. This is so you the grower can look at a product and within a second, you know if it's going to work or not. Not only that, by requiring them to list every single ingredient, you know if it's safe for food crops. Very useful to know if your making pot brownies.
In hydroponic systems, your looking for something that runs cleans and is highly water soluble. Outside in the garden, you want the exact opposite. Something that won't wash away when the rains come or the sprinklers turn on. This is where a slow releasing fertilizer in dry or granual form work best.
So when your looking at that bag of tomato fertilizer, first ask yourself how you'll be using it. The name means nothing. Its all about dry vs wet. Slow release vs quick absorption. Soil vs hydro. Once that's determined. Then look at the NPK profile. Is it all purpose, veg, or bloom?
IS THIS ANY GOOD OF A FERT TO USE ON MY WHITE WIDOW ALL HELP MUCH APPRECIATED 
