Problems With Vermicomposting: How To Deal With Vermicompost Issues

(Image credit: Tommy Lee Walker)

Vermicomposting is the practice of using red worms to help break down food waste. The worms may be housed in a cardboard box, plastic bin, or wooden structure. The worms need bedding as a home, and the box must have holes in it for drainage and aeration. Earthworm vermicompost is the natural product yielded by garden worms. Also called castings, it's nutrient rich and provides excellent food for your plants. Learn how to deal with vermicompost issues to ensure healthy worms and rapid break down of your kitchen waste.

How to Deal with Vermicompost Issues

Worm bins are simple to make, but a few vermicomposting problems arise as a direct result of an incorrectly built bin. For example, if there are not enough holes, the interior will be too moist and the food scraps will rot. Drainage will also be inadequate and the worms could drown. The choice of bedding is also important to avoid problems with the delicate balance of the environment. There does need to be slight moisture and a moderate pH level. Paper and loose bedding, like shredded cardboard, tend to dry out too quickly. Peat moss has a low pH level that is not good for worm health. Outdoor earthworm vermicomposting relies upon the ability of the worms to move to suitable locations. Containerized vermicomposting relies upon you to provide the ideal habitat.

Vermicomposting Problems

Take care to position the worm bin where it is warm enough. The optimum temperature is 50 to 80 degrees F. (10-26 C.). Cut food scraps into small pieces that the worms can break down quickly and easily. This prevents moldy chunks in the compost. Worms can eat most food scraps that you or I might digest, but avoid greasy, smelly, and animal products. These types of foods may cause your castings to smell rotten, or the worms may not even break them down. Keep vermicomposting problems to a minimum by following the guidelines on container, site, moisture, and food scrap characteristics.

Pests in Vermicompost

Vermicompost may occasionally have gnats or flies hovering about. The gnats may be from soils that are too moist. The solution is to keep the lid off to dry the bin or reduce watering. You can also mix in extra bedding to distribute the moisture. Flies are attracted to the food itself. Overly large pieces of food or foods that are not buried in the bedding will pose an irresistible lure to flies. Other pests in vermicompost are not common, but outdoor bins may become the local hangout for beetles, sow bugs, and other insects that break down organic matter. Worm bins that carry a strong smell are also of interest to raccoons and certain other scavenging animals.

Worm Castings in the Garden

Once food has broken down into castings, the material is suitable for mixing into garden soil. Remove one-half of the reduced material and use in the garden. Save the other half as a “starter” and layer it over fresh bedding and add more food scraps. Vermicomposting problems are easy to avoid when you keep a constant temperature, moisture level, and use the right kinds of food scraps.

Bonnie L. Grant

Bonnie Grant is a professional landscaper with a Certification in Urban Gardening. She has been gardening and writing for 15 years. A former professional chef, she has a passion for edible landscaping.