Inch By Inch Worm Castings

Locally Produced Worms and Worm Castings in Tucson, Arizona

“Everything I plant thrives, including things I have had problems growing in the past. I use lots of your worm castings in the soil a couple times a year and it makes a big difference. I also make worm casting tea a few times a year and pour it over the entire garden. Thanks for the excellent product.”

Mike McNab in Tucson, AZ

About Us

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.

Get In Touch or Pay Us a Visit


1104 N. Anita Ave
Tucson, AZ 85705

We’re hard to find, click here for a map.

Hours: By Appointment