Composting for Beginners

Composting is the process of turning organic waste — kitchen scraps, yard trimmings, and other biodegradable material — into nutrient-rich soil amendment. It is nature's recycling system, and it works at any scale from a small apartment worm bin to a three-bay backyard system.

Why Compost

Reduce waste. Food scraps and yard waste make up 30% of what Americans send to landfills. Composting diverts this material from trash collection and turns it into something useful.

Build soil. Finished compost improves soil structure, adds nutrients, increases water retention, and feeds beneficial microorganisms. It is the single best soil amendment available and you can produce it for free.

Save money. Homemade compost replaces purchased soil amendments, reduces fertilizer needs, and decreases the amount of waste hauled away in garbage collection.

What to Compost

Green materials (nitrogen-rich):

• Fruit and vegetable scraps
• Coffee grounds and tea bags
• Fresh grass clippings
• Fresh garden trimmings
• Eggshells

Brown materials (carbon-rich):

• Dried leaves
• Cardboard (torn into small pieces)
• Newspaper (shredded)
• Straw and hay
• Dried plant stalks
• Sawdust (untreated wood only)

Do not compost:

• Meat, fish, and dairy (attract pests)
• Cooked food with oil or sauce
• Pet waste (contains pathogens)
• Diseased plants (spreads disease)
• Weeds with seeds (may survive composting)
• Treated or painted wood

Composting Methods

Open pile. The simplest method. Build a pile at least 3 feet square and 3 feet tall in a back corner of the yard. Add materials in roughly equal parts green and brown, keep moist, and turn monthly. Produces compost in 6-12 months.

Enclosed bin. A tumbler or bin contains the pile, keeps pests out, and looks tidier. Tumbler bins are easy to turn — just spin the drum. Enclosed bins produce compost in 3-6 months with regular turning.

Worm composting (vermicomposting). Red wiggler worms process kitchen scraps in a compact indoor or outdoor bin. Ideal for apartment dwellers and small spaces. Worm castings are exceptionally nutrient-rich. Produces usable compost in 2-3 months.

Trench composting. Dig a trench in the garden, fill with kitchen scraps, and cover with soil. The material decomposes in place over 3-6 months. No bin, no turning, no maintenance — just bury and forget.

Getting the Balance Right

Successful composting requires a roughly 3:1 ratio of brown to green materials by volume. Too much green (nitrogen) makes a slimy, smelly pile. Too much brown (carbon) slows decomposition to a crawl.

Moisture. The pile should feel like a wrung-out sponge — damp but not dripping. Add water during dry spells, add dry brown material if the pile is too wet.

Air. Turn the pile every 2-4 weeks to introduce oxygen. Anaerobic (airless) conditions create foul odors and slow decomposition. A well-aerated pile smells earthy, not rotten.

Temperature. An active compost pile heats to 130-160°F in the center, which kills weed seeds and pathogens. If your pile is not heating, it needs more green material, more moisture, or more volume.

Using Finished Compost

Compost is ready when it looks and smells like dark, crumbly soil with no recognizable food scraps. Spread 1-2 inches over garden beds annually as a top dressing. Mix into planting holes for new shrubs and trees. Use as a potting mix ingredient (up to 30% by volume). Side-dress vegetable plants during the growing season for a nutrient boost.

Even a small compost operation produces noticeable improvements in garden soil within one season. Start with whatever method fits your space and lifestyle — the perfect composting system is the one you actually use.