Compost serves as both a powerful fertilizer and a rich source of minerals, making it ideal for young plants and heavy feeders. It also enhances soil structure. Indispensable for every garden, compost delivers concentrated humus—the key to sustaining natural soil fertility. But how does it work, and how can you prepare it effectively?
Compost arises from the breakdown of plant wastes and debris, particularly lignin-rich materials like flowers, hay, straw, twigs, and dead leaves found in wood. Composting accelerates the natural transformation of these into humus, a process that typically occurs slowly on the soil surface. When done right, compost from kitchen scraps and garden trimmings supplies all essential plant nutrients: nitrogen, phosphorus, potash, calcium, magnesium, and trace elements. To prevent odors and ensure aeration, simply turn it thoroughly with each addition.
Composting excels as a soil cleanup method when balanced with proper aeration and moisture. Recent research confirms that its microorganisms neutralize pathogenic fungi causing diseases and rot. Compost safely breaks down diseased plant material through enzymes and other secretions. Even diseased plants, toxic weeds, or others can go in—just avoid overusing cedar, cypress, eucalyptus, or juniper.
Apply mature compost in fall, when soil microbes and earthworms are most active. Spread it on the surface, lightly scratch it into the top centimeter of soil, and cover with mulch to retain moisture—the worms will integrate it naturally. Avoid overapplication: 3-4 kg per m² every 2-3 years suffices. Sandy or clay soils can take up to 5 kg, but excess risks nitrate leaching into water. Mature compost is dark, crumbly when dry, and odorless—plan for about a year of maturation.
Piles enclosed by boards or bricks offer the simplest setup. For bins, opt for square designs at least as wide as tall for easy turning. Materials like mesh, sheet metal, wood, or pallets work well, as long as moisture is maintained. A perforated tarp and regular watering suffice. For wooden silos, space slats no more than 3 mm apart to prevent drying; use a solid lid and line the interior with cardboard for humidity retention.
