What elements does a plant need to grow?
I've been growing hydroponically through the pandemic. I'm now switching from commercial pre-blended nutrients to my own design, customized for my hard water and blended from individual salts. In the linked article, I briefly review the biochemistry, show the fertilizer design calculations using an open-source tool that I wrote, and review a lab analysis of the final solution.This is a fair amount of work, and I'd guess that relatively few non-professional growers would bother. I hope this may be interesting to anyone generally curious about plant nutrition though, or about the design of modern complete chemical fertilizers.