How to Build Healthy Soil with Regenerative Gardening: A Complete Guide

In this post, you’ll learn how to build healthy soil using regenerative gardening practices. These tips are inspired by the work of John Kempf and supported by science-backed strategies that every home gardener can apply—no matter your garden size or experience.

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If you’ve ever felt confused about how to improve your soil, you’re not alone. Soil health is one of the most important (and sometimes most overwhelming) topics in gardening.

But here’s the truth: Soil is not just dirt, it’s a living ecosystem. And when we understand how to work with nature instead of against it, we can create gardens that are more productive, resilient, and nutrient-rich than ever before.

Soil Is Alive and It’s the Heart of the Garden

When we talk about soil, it’s easy to think of it as just the stuff that holds our plants. But according to regenerative gardening principles, healthy soil is a vibrant community of life.

In just one handful of healthy soil, there are billions of bacteria, fungi, and other microbes that all play important roles.

Bacteria break down organic matter and release nutrients. Fungi, like mycorrhizae, form long networks that help roots absorb water and minerals.

And plants don’t just passively grow in this system, they actually communicate with microbes by releasing chemical signals through their roots (called root exudates) to attract the helpers they need most.

If you prefer to listen you can learn more in my podcast episode below!

Why Microbes Matter

Soil microbes do more than just break things down. They create soil structure, fight off harmful organisms, and unlock minerals that would otherwise be unavailable to your plants.

Here’s What Microbes Do:

• Break down organic matter into nutrients plants can absorb
• Build soil aggregation for better drainage and root growth
• Outcompete disease-causing pathogens
• Convert minerals into plant-available forms

The key takeaway? Healthy soil life supports plant health. And when we damage that life, through excessive tilling, synthetic chemicals, or leaving soil bare, we interrupt the natural system plants rely on.

You Don’t Need to Add Microbes, You Need to Feed Them

One of the biggest myths in gardening is that you need to constantly add microbes. The truth is, they’re already in your soil, you just need to feed them. Organic matter, compost, mulch, and keeping living roots in the ground all do that naturally.

That said, if your soil has been depleted or you’re just getting started in a new space, sometimes a little help can jumpstart the process. That’s where products like Earth Medicine come in.

It’s a microbial fertilizer that gives your soil a boost, helping plants thrive while you continue building long-term soil health the natural way.

Why Roots Feed the Soil Better Than Compost

Compost and mulch are great, but roots are even better. When a plant is growing, it sends out exudates, high-energy sugars, amino acids, proteins, and more, that directly feed soil microbes.

These compounds are much easier for microbes to digest than the tough cellulose and lignin found in plant debris.

Plus, the carbon from roots stays in the soil much longer than the carbon from composted shoots. That’s why practices like cover cropping and keeping living plants in the soil year-round are so powerful.

Key Takeaways:

• Keep your soil planted year-round (use cover crops or even weeds if necessary).
• Choose perennials when possible, they send more carbon into the soil.
• Interplant with various plant families which attracts a wider variety of microbes.
• Keep roots healthy with proper watering and minimal disturbance.

The Role of Necromass in Building Soil Structure

Here’s a surprising fact: Some of the best carbon in your soil comes from dead microbes.

This “necromass” forms stable soil aggregates that improve drainage, aeration, and resistance to erosion. In fact, studies show that microbial necromass makes up 45% to 78% of organic carbon in soils, depending on the ecosystem.

While specific percentages can vary depending on the ecosystem, studies have shown that microbial necromass can contribute substantially to soil organic carbon.​

How to Increase Necromass:

• Encourage large microbial populations by using compost, cover crops, and living mulch.
• Avoid tilling, which breaks down microbial communities and disrupts soil structure.

Cover Crops and Living Mulch for Year-Round Soil Health

Cover crops are a game-changer for soil health. These are plants you grow in between seasons to keep the soil covered and full of life. Living mulch is similar, it’s a low-growing crop planted alongside your main crops.

Benefits of cover crops and living mulch:

• Add organic matter above and below ground
• Feed microbes through roots and shoots (definition below)
• Prevent erosion and nutrient leaching
• Improve water retention and structure
• Boost microbe diversity by adding new plant families

To get the most from your cover crops:

• Use a mix of species (legumes, grasses, and broadleaves)
• Plant during the off-season or in unused garden spaces
• Choose varieties that work for your local climate
• Terminate them at the right time (before going to seed)

In gardening and plant biology, “shoots” refer to the above-ground parts of a plant, especially new growth. That includes:

• Stems
• Leaves
• Flower buds
• New branches

When people talk about adding “shoot organic matter” to soil, they usually mean chopped-up plant tops, leafy trimmings, or green material like grass clippings, cover crop cuttings, or plant prunings, all of which can be composted or used as mulch to feed the soil.

In contrast, the roots are the below-ground part, and while shoots take in sunlight for photosynthesis, roots feed the soil more directly through exudates and necromass when they die.

Should You Use Potting Mix or Native Soil?

If you’re growing in containers, potting mix can be helpful. But for in-ground beds, or raised garden beds, working with your native soil is best in the long term.

Potting mix is lightweight and convenient, but it lacks minerals and microbes. Native soil, even if it’s not perfect, already has microbial life and a mineral profile adapted to your area. Plus you can continuously improve it overtime.

If you do use potting mix, consider blending in some compost or native soil to reintroduce beneficial biology.

Simple Steps to Build Regenerative Soil at Home

1. Minimize Disturbance: Avoid tilling when possible. Try no-dig methods and use a garden fork instead of a rototiller. However, if you’re starting a brand new garden with hard and compacted soil, tilling can be very helpful during your first season to get the soil worked up.
2. Keep Soil Covered: Use mulch or cover crops to protect soil life from heat, erosion, and compaction.
3. Feed the Soil Life: Add compost and grow a diversity of plants to support a healthy microbial community.
4. Promote Living Roots: Always keep something growing in the soil—even a temporary weed cover is better than bare dirt.
5. Increase Diversity: Mix up your plantings and interplant different species together. Learn more in my post here, Easy Guide to Companion Planting.

What Pests and Diseases Tell You About Your Soil

Here’s one of the most fascinating things I’ve learned: Pests and diseases are often symptoms of plant stress, not the actual problem.

When soil is healthy and plants are well-nourished, they can naturally resist most issues. For example, aphids tend to target plants with too much nitrogen and not enough calcium, often a result of over-fertilizing.

Rather than reaching for sprays, ask what your soil and plants might be missing. Focus on building a strong foundation, and pests and diseases will become less of a problem over time.

Learn more about naturally keeping pests away in my post here, How to Naturally Prevent Garden Bugs.

Final Thoughts

Building regenerative soil isn’t about perfection, it’s about progress. Even small changes, like adding compost or growing one new cover crop, can make a huge difference.

If you’re ready to dive deeper into soil health, be sure to check out the Soil Series inside my membership, Audrey’s Little Farm Academy. It’s a three-part video training featuring expert Robert Pavlis, and it’s one of my favorite series we’ve ever done.

You can start your 14-day free trial here, and get instant access to the Soil Series and all the other training videos, cheat sheets, and resources inside the Academy.

Let’s keep growing and building soil that supports healthier plants, more abundant harvests, and a better future for our gardens.

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