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Boys Club of New York's Herb Spiral Project Incorporates Math, Permaculture Design, Soil Science, and Microclimates | NYC Foodscape
An herb spiral is a permaculture garden that uses a spiral of rocks or bricks to contain soil and other filler to grow a diverse array of herbs. The stone acts as insulation for the plants, warming the soil and maximizing the use of space, water and other resources.
