How to make your own fully-formulated plant nutrient: Step by step procedures for hydroponic, container and all soil growing

Hydroponic Nutrients: Easy Ways to Make Your Own (A Cultural Handbook)

How to Start on a Shoestring and Make a Profit with Hydroponics; Including set-up, production and maintenance, and marketing.

How to Start on a Shoestring and Make a Profit With Hydroponics: Including Set-Up, Production and Maintenance, and Marketing

PLant Nutrient Facts for Hydroponics & How to Make Your Own Fully Formulated Plant Food