100% Organic. Wiggle Worm Soil 
Builder™ controls all aspects of the worm's environment 24 hours a day, 7
 days a week and 365 days a year which eliminates all variables that 
could affect pureness. This level of control produces a pure, consistent
 product that can be used as a soil amendment and as a fertilizer. The 
nutrients and microbial activity of worm castings produce a "living 
soil" for plants to thrive in. As they are truly pure castings, you only
 need a small amount around your plants, vegetables, shrubs or grasses 
to see beautiful yields and growth. A half handful around the root zone 
of a transplant will produce up to 3-5 times the fruit and plant growth.
 A little goes a long way. OMRI Listed®