Natural supplement tips and help!

Im a nub so plz dont hate! just trying to create something that helps fellow growers like me.. I am trying to find natural supplements that is bang for your bucks instead of going out and getting ripped off by the commercial stuff! I am on a budget and hopefully the next green thumb will add to this post!! Ill start with my favorite..

Liquid Kelp = a bottle of cal-mag, revive from AN, clone x, and more

Espon Salt & Dolemite Lime = Cal Mag in a bottle

Seep chilli pepper in water and dish soap = ladybug spidermite spray!

The lime won't go into solution so that won't work. You'll have to add that to soil.