Inch By Inch Worm Castings

We are INCH BY INCH — a Tucson, Arizona-based and locally owned worm and worm casting business. 

Our mission is to grow the healthiest worms and make the best soil supplements we can, to sell these at a fair price, and to make our plant environment stronger and healthier. We are devoted to a beneficial relationship with our customers, our employees, our vendors, and any others with whom we have contact.

What are Worm Castings?

As worms digest food, they leave their castings behind in the bedding or soil where they live. Castings (or vermicompost) are worm excrement. The vermicompost is made up of live biological organisms, including fungi, actinomycetes, beneficial bacteria, pseudomonads, plant growth regulators, yeasts, molds, trace elements and Nitrogen, Phosphorus and Potassium (N-P-K). Castings actually contain a perfect mix of nutritional needs.