Our Moss Spores are of a variety commonly termed 'Kyoto' Moss, as is prevalent at the Kyoto Gardens in Japan. The beautiful, bright green velvet appearance is weed free, since it is greenhouse-grown in sterilized soil. Shelf life is indefinite, as spores are packed in a zip-lock bag within the envelope. A detailed growing guide is included. Covers up to 3 square feet. 1/2 Ounce Net Wt.