I wanted to mix my own fertilizer as I found some hints what to mix in a book. In the book there is an example:

- Code: Select all
`Hydroponic nutrient recipes`

To make 1.00 gallon(s) of FLOWERING NUTRIENT 5.5 - 7.97 - 18.4

Use

4.10 grams of Calcium NitrateCa(NO3)2

2.80 grams of Potassium Nitrate KNO3

0.46 grams of Potassium Sulfate K2SO4

1.39 grams of Monopotassium Phosphate KH2PO4

2.40 grams of Magnesium Sulfate MgSO4 * 7H2O

0.40 grams of 7% Fe Chelated Trace Elements See Trace Box

So far it's clear. Then I downloaded the spreadsheet "saltmix3". When I type in the numbers there I get NPK of 264-82-424 based on those gram and 1 gallon. (I ignored the 0.4g Fe)

Can somebody explain that roughly? Or give a link (that is suitable for dummies)?