






From the brand



About Us
UNCO Industries has been in worm farming for over 45 years, beginning as a small redworm bait operation in an old dairy barn. As demand grew, the company expanded and invested in controlled, scalable production. In 1983 it established a climate-controlled facility, and in 2011 moved to a much larger site in Union Grove, Wisconsin to support continued growth.
Why are Wiggle Worm castings better than the rest?
Our unique process delivers pure earthworm castings free of impurities like undigested bedding, stones, straw, and worm eggs. Our multi-screening process removes eggs without heat or sterilization, preserving beneficial bacteria and microbes.
What are the earthworms fed?
An organic material containing a wide variety of minerals and trace elements
Does this product provide long-term nutrition for plants?
Yes, in addition to readily available nutrients, it contains nutrients that release slowly, supporting plant growth for weeks or even months.


For Organic Gardening
Our Pure Worm Castings are OMRI listed organic, nutrient-rich, and mineral-dense pure castings, not vermicompost or uneaten worm bedding, and is one of the only castings products to be recognized as a fertilizer due to our special manufacturing and harvesting process.
More from Wiggle Worm!
Soil and Fertilizer Mixture: Composed of high-quality compost soil blended with trace amounts of worm castings and worm eggs – Worm eggs are hardly noticeable within worm castings, and colors/levels of translucency may vary.
All-in-One Planting Media: Plant directly into the Raised Bed Mix to provide your plants with a soil that comes enhanced with fertilization, water retention, and aeration due to the included worm castings, as well as a microbe-rich environment provided by the egg material.
A Chance for Worms: Worm eggs may hatch in soil, adapt, and begin to help improve soil quality – Worm tunnels bring in oxygen, drain water, and create space for plant roots, and live worms will produce more castings.
Easy-to-Use: Pour straight from the bag into the planter box or raised bed alone or alongside other organic materials to create an ideal home for your plants – Can also be used for trees and bushes grown in the ground.
Simple Packaging: Ships in a black-and-white printed bag with the same great product inside.

Cian&Dewi –
CT –
alfredo corpas –
R B –
Jean Lewis –
straightshot –
xena777xena –
Charlene –