Rain is a free, valuable resource that savvy gardeners know how to collect and save for the future. A carefully placed barrel under your rain gutter is the simplest way to close the loop of your own personal water cycle. But why use a typical, puny 50-gallon barrel when a thirsty vegetable garden needs about 1 gallon per square foot per week in the summer? In this how-to we’ll show you the ins and outs of installing a 300-gallon horse trough that not only collects water for food production, but also functions as an attractive water garden in the off-season and provides a habitat for frogs and fish that eat pests (like mosquitoes).
Source: Modern Farmer