Greetings, This is my first post on here. I have been curious into developing my own fertilizer for at home gardens. Particularly indoor plants, small gardens, etc. I run my own small garden and have done so for years using many products including organic teas, composts, chemical fertilizers, and so on. I recently became curious in creating my own custom blend for me and some friends. I am currently a senior at Arizona State getting my b.s in biochemistry, and I am pretty knowledgeable in chemistry and biology as expected. With my gardening interests I believe this to be something in my realm. Here is my proposed blend: I want a N-P-K of roughly (15.5-19-38) I have not concluded what chemical fertilizers are the cheapest and best so these are my proposed ingredients. Calcium Nitrate ( to provide the nitrogen level and calcium) - 15.5% - Nitrogen - 19% Calcium I have not found out what to use to provide my ratios of P-K. What would be the best chemicals to get these levels? (Soluble Potash)? For the micro-nutrients I have found a supplier offering all chelated essentials in a single mix. I simply plan on buying this and mixing it accordingly, however it seems rather expensive at 70$ a lb, but 1oz makes 50 gallons so it essentially will make plenty of uses. The percentages of each micro-nutrient are not given either. I could get them if I inquired but I believe them to be standard levels. The levels I am looking for are around: Copper - 2.5% Boron - .001 Manganese - .06% iron - .08% zinc - 10% molybdenum- .03% I noticed that this package does not include Cobalt, Nickel, Silica, or Magnesium. Which of course are needed! I am kind of stumped on the micro-nutrient part, would I have to buy these all individually to get these percentages? My sulfur content would be at 4% I also plan on using beneficial bacteria as well. Soluble Powder Bacillus 1 billion CFU's / Gram Bacillus subtilis sp. 1 Bacillus subtilis sp. 2 Bacillus subtilis sp. 3 Bacillus subtilis sp. 4 Bacillus polymyxa Bacillus licheniformis Bacillus amyloliquefaciens if anyone has any input please reply!