Vermicomposting 101 (video)

Presenter: Leah Finn, Master Gardener
LMUD Garden Club presentation, November 9, 2026

What if your kitchen scraps could become one of the best resources for your garden? Vermicomposting, or composting with worms, is a simple and sustainable way to turn organic waste into nutrient-rich soil amendments while giving back to the planet.

In this presentation, Leah Finn explores the benefits of vermiculture, how to build and maintain a worm bin, and how to harvest and use worm castings to improve garden health.

Key Takeaways

• Reduce food waste: The average American throws away approximately 209–254 pounds of food each year. Vermicomposting offers a practical way to keep food scraps out of landfills and turn waste into a valuable resource.
• Understand the power of worms: Vermicomposting uses worms to break down organic materials into nutrient-rich castings (worm waste) that benefit soil and plants.
• Build healthier soil naturally: Worm castings improve soil drainage and aeration, increase water retention and nutrient uptake, support beneficial microorganisms, and encourage stronger root growth and seed germination.
• Know what to feed your worms: Worms enjoy vegetable and fruit scraps, eggshells, coffee grounds, tea, shredded paper, cardboard, and yard trimmings. Avoid citrus, onions, dairy, fats and oils, meat, fish, and animal waste.
• Create the right environment: A worm bin needs a container with a lid, appropriate bedding (such as coconut coir, shredded newspaper, cardboard, or leaves), worms, and food scraps. Avoid using bagged potting soil.
• Keep your worm bin healthy: Feed worms approximately once a week, depending on the weather, and make sure they’ve eaten their previous food before adding more. Worms thrive in temperatures between 40°F and 90°F. A healthy worm bin should smell like rich, fresh soil—not sour or unpleasant.
• Harvest your worm castings: When the contents resemble a thick, mud-like consistency, the bin may be ready to harvest. Moving food to one side of the bin ahead of harvesting encourages worms to migrate, making it easier to collect the castings.
• Put those castings to work: A little goes a long way! Add a small handful around individual plants to enrich your soil and support healthy growth. Castings can also be stored for up to a year in a cool, dry place.

Meet the Presenter

Leah Finn is a Central Texas gardener, Master Gardener (2022), and outdoor educator at Dripping Springs Elementary. With a passion for vermiculture, permaculture, and regenerative agriculture, Leah is dedicated to helping others discover practical ways to live more harmoniously with nature.

Want to learn more? Watch the presentation above and discover how a simple worm bin can make a big difference in your garden!