K-L-N and SuperThrive are NOT fertilizers, they are intended to be fertilizer additives.
Both contain rooting hormones. K-L-N contains both indole butyric acid (IBA) and naphthalene acetic acid (NAA), SuperThrive contains only NAA. They both contain vitamin B1, which is also a root growth stimulant.
As to the Naturize product, I am skeptical, and having read one of their patents, somewhat scared. - Generally speaking, nutrition is nutrition, and as long as you provide proper amounts of the correct nutrients in the correct ratios, the brand is meaningless. In general, if a fertilizer label or ad touts "years of research and independent testing", they're really telling about marketing, not science.
- Their "bio-charged" thing is about added microorganisms that help with food availability in soil. With the way people treat their lawns and gardens with chemicals of all sorts, an occasional boost might not be a bad idea. However, while we are aware that interactions with microorganisms are what gets orchid seed to germinate in nature, there is no evidence they do anything in non-soil nutrition, especially in flower pots.
- Their patent claims that those microorganisms are "bacteria, fungi, or viruses, or combinations thereof". Do I really want to expose my plants to that?
As an editorial comment (that may-, or may not apply here): very often, when a new "miracle" fertilizer or nutritional supplement comes about, folks try it and claim that it is fantastic, as they see bigger plants, more blooms, etc. What they fail to realize is that the novelty of the product has shifted them their old, lackadaisical, hit-or-miss feeding regimen to a regular one that is better for the plant, and it's the general application of sufficient nutrient that causes the response, not the specific one applied. I saw that happen with the MSU stuff, and while it is a good, complete fertilizer, it's not "magic".
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