Wool pellets are a climate friendly, sustainable soil additive made from 100% wool that is heat pelletized for horticultural use. Wool naturally contains many macro and micronutrients and wool is fully biodegradable. Wool pellets hold moisture in the soil and makes it bioavailable to plants when they need it. As the pellets break down in the soil, over the course of a year, they release nutrients and create space that aerates the soil.