Red Wrigglers, as they burrow and feed, swallow great quantities of soil, digest it and expel the residue as worm castings which is incredibly rich in plant nutrients, including calcium, magnesium, nitrogen, phosphates and potassium. Earthworm castings eliminate the need for artificial or chemical foods in your plants — once worm castings have been added to your soil (a mixture of 5 parts existing soil to 1 part worm castings) your plants will draw essential nutrients from the castings. They don’t burn like man-made fertilizers, and stay in the soil longer, continuing to feed plants for months. This amazing plant food will markedly improve the health of your plants in 30 to 60 days, making your plants more luxurious looking. Worm castings are completely odorless, and they are beneficial to both indoor and outdoor plants –perfect for small vegetable gardens as well as your house plants. 1 quart plastic tub.