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How to build a mason jar herb garden
Get a set of mason jars that are at least 4 inches (10 cm) deep.
Ordinary glass mason jars can be purchased inexpensively at most supermarkets and home good stores. Pick up as many jars as you think you'll need to contain a garden of the size you have in mind.
Mason jars are often sold in sets, which can simplify the process of collecting them. Most mason jars come in either quart or pint sizes, which can be useful if you're planning on growing more of one type of herb than another.