How Native Decomposers Work With Direct Composting
Let them do what they do best. Create that beautiful black soil you're looking for!
In-ground composting, also known as direct composting, is one of the simplest ways to turn kitchen scraps and garden waste into rich, fertile soil. Unlike traditional composting methods that require bins, turning, or special equipment, direct composting involves burying organic matter directly into the ground. While the method may seem effortless, it is powered by an unseen but bustling workforce: native decomposers.
What Are Native Decomposers?
Native decomposers are the organisms naturally present in your soil that break down organic matter. This diverse group includes:
Microorganisms: Bacteria and fungi are the primary drivers of decomposition. These microscopic creatures consume organic matter, breaking it down into simpler compounds that plants can use as nutrients.
Earthworms: Often referred to as "nature’s plows," earthworms aerate the soil as they tunnel and feed. They digest organic material and excrete nutrient-rich castings.
Insects and Arthropods: Creatures like beetles, ants, and centipedes help break down larger materials into smaller pieces, making it easier for microbes to do their work.
Larger Soil Fauna: Animals like moles or even rodents can assist in soil mixing, though their involvement is often indirect and a little bit destructive to our gardens
How Decomposers Interact with Direct Composting
When you bury your kitchen scraps or garden waste in the soil, native decomposers immediately get to work:
Bacteria Lead the Charge: Bacteria are the first responders. They begin breaking down soft, nitrogen-rich materials like fruit peels or vegetable scraps. These microbes thrive in the moist environment created by the buried scraps.
Fungi Join In: Fungi excel at breaking down tougher, carbon-rich materials like woody stems, eggshells, or fibrous plant parts. They work more slowly but play a crucial role in decomposing these harder-to-digest items.
Earthworms Take Over: As bacteria and fungi soften the organic matter, earthworms move in to consume it. Their digestive systems further break down the material, enriching the soil with their nutrient-packed castings.
Insects Help Disperse Material: Insects like ants and beetles break down the scraps into smaller fragments. This increases the surface area for bacteria and fungi to access, accelerating decomposition.
Benefits of Native Decomposers in Direct Composting
Nutrient Cycling: Decomposers transform organic waste into nutrients that plants can readily absorb.
Improved Soil Structure: Earthworms and other soil fauna create channels and spaces in the soil, improving aeration and water retention.
Pest Reduction: Direct composting keeps waste buried, reducing the likelihood of attracting pests compared to surface composting methods.
Self-Sustaining Process: Native decomposers are already adapted to your local environment, requiring no additional inputs or maintenance.
Encouraging Native Decomposers in Your Garden
To make the most of direct composting, create a welcoming environment for your native decomposers:
Bury Scraps Deep Enough: Dig a hole or trench about 6-12 inches deep to keep organic matter out of reach of larger pests while creating an ideal habitat for decomposers.
Add a Mix of Materials: Combine green (nitrogen-rich) materials like fruit peels with brown (carbon-rich) materials like dry leaves or shredded paper. This balanced mix provides a complete diet for decomposers.
Maintain Moisture: Moist soil supports microbial activity. If the ground is dry, lightly water the area after burying your scraps.
Avoid Harsh Chemicals: Pesticides and synthetic fertilizers can harm decomposers. Stick to organic gardening practices to keep your soil healthy.
Rotate Composting Areas: Spread out your direct composting sites to avoid overloading a single area and to enrich different parts of your garden.
Native decomposers are the unsung heroes of direct composting, tirelessly working to turn your kitchen and garden scraps into life-giving soil. By understanding their role and providing the conditions they need to thrive, you can enhance the efficiency of your in-ground composting efforts and create a thriving, sustainable garden. So the next time you bury your scraps, remember: you're not just discarding waste—you're feeding an underground ecosystem that powers your garden's growth.
I’ve also heard it called flat composting.
I did try it once, some years ago, at a local community centre, but some critter dug the veg scraps and left a big hole - possibly a badger or fox. So had to give that up and sort of forgot about it. Now my food scraps go the compost bins at my allotment acquired since.
I do use no-till and mulching on my allotment beds, so digging a trench for flat composing kinda goes against that idea, so it’s a bit of a dilemma!
Excellent piece - I've also noticed how native composters don't like processed food too much (I guess because of the preservatives?) - so they obviously know what is good for them!