npk is the ratio of what basic three elements of food are available to a plant in said feed
N- nitrogen, the main food for growth of stems and leaves etc.
P- phosphorous, roots, flowers, seeds and fruits etc
K- potassium, overall plant health, co2 uptake etc
there are also a tonne of other elements in the feed that you need to look on the back to see but all manufacturers will print the main 3 on the front of the bottle to give you an idea of what the feed will give you.
in essence, what budman means is: he hasn't tried said product but will still mention in a derogatory fashion because he is ignorant.
he is in multiple threads talking trash about nutrient lines he doesn't think people should buy because they are "over marketed and over priced" (in his opinion). everyone who uses them is WRONG and an IDIOT or something along those lines.........
he is entitled to that opinion but i feel strongly that people should not make decisions based on HIS opinion of what you should be doing in YOUR grow room.
i have used bloombastic for over 5 years, in that space i have only completed 3 grows without it and believe there IS a huge difference when it is used PROPERLY. it finishes the plants off and used along side a good base nutrient like canna coco (npk 5-4-3) it enhances flower production and quality.