After studying hundreds of product labels and reading several thousand posts, I am convinced that no one (even plant biologists and nutrition companies) have a clue about optimum NPK ratios other than the basic:

More nitrogen in veg
More phosphorous in flower

Of course different plant species have different requirements, but beyond that the science is very slim and the only advice is 'cater to your plants' or 'buy our 10 products for maximum budding'.

Doing a tiny non-comparative grow that takes 4 months to complete tells me nothing at all. I would have to grow one strain in a large greenhouse doing many dozens of variations for years to fine-tune it and even then, I could not be sure that I was close to optimization.

Is this really as far as we have come as a collective or am I missing something ?
RackitMan Reviewed by RackitMan on . Plant Nutrient Nonsense After studying hundreds of product labels and reading several thousand posts, I am convinced that no one (even plant biologists and nutrition companies) have a clue about optimum NPK ratios other than the basic: More nitrogen in veg More phosphorous in flower Of course different plant species have different requirements, but beyond that the science is very slim and the only advice is 'cater to your plants' or 'buy our 10 products for maximum budding'. Doing a tiny non-comparative grow Rating: 5