Why Are Earthworms Good For Gardens?

Earthworms aren’t as cute as colorful caterpillars, but they offer many valuable benefits to the environment. You should be happy if you find them in your garden, even if you're not sure of what they do. So, why are earthworms good for gardens?

Earthworms produce nutrient-dense droppings known as castings, which support healthy plant growth. They also burrow through the soil, creating tunnels that help naturally aerate your lawn and soil beds. Worms support the many beneficial microorganisms in your garden through a unique symbiotic relationship.

However, you won’t find many earthworms in your garden if you use harmful pesticides and synthetic fertilizers. Follow along as we explore why earthworms are so beneficial for gardens.

Five Benefits Of Worms In Your Garden

Earthworms help gardeners in countless ways, but some of them are more obvious than others. They are especially great for your garden in a few noticeable ways, such as:

1. Adds Nutrients To The Soil

If there’s one thing that your plants need as much water and sunlight, it’s nutrients such as nitrogen, potassium, and phosphorus, among other. Worm castings contain a lot of nitrogen and potassium, which are perfect for your garden.

The earthworm excrement is very beneficial because the worms eat organic matter in the soil all day, leaving nutrient-dense waste behind.

These droppings mix with the soil and reintroduce key nutrients, which your plants will then absorb. This positive cycle can support plants for their lifespan, and it’s such an easy way to nourish them. Of course, you must still water your plants and ensure they get enough sunlight. That said, water and sunlight won’t help much without nitrogen and potassium.

2. Natural Aeration And Soil Drainage

Many people aerate their lawns and gardens annually to help the soil breathe and thrive. While you should do that yearly, you can also add earthworms to aerate the soil naturally. Worms slither through soil and create small tunnels. These tunnels help oxygenate your plants and will also improve soil drainage, which is important, as poor drainage can leave the soil waterlogged. Excess water can contribute to root rot, which can eventually kill your plants. Fungal diseases can take over and spread to nearby plants. However, natural aeration and proper soil drainage can protect your plants from such diseases and help them thrive.

3. Boosts Soil Stability

Earthworm castings are a big part of why earthworms are so good for gardens. These benefits apply to soil stability as well, which is invaluable in any area and climate. The tunnels help support the structure, and their castings help bind the soil. This binding effect keeps the soil intact, which can help prevent it from washing away. Soil erosion and can deprive plants of essential nutrients.

Worm castings help stabilize the soil to ensure rain, snow, and strong winds don’t weaken it. That’s especially true if you apply mulch, which can also protect against soil erosion. Worms love mulch because it provides a safe, comfortable, damp environment for them.

4. Supports Microbes

Some people view soil as a plot of dirt that holds their plants. However, that dirt is full of microscopic organisms, known as microbes, that play a big role in plant health. Earthworms help feed microbes in the soil. At any given time, you can likely find a bunch of microbes in the gut of the worms in your soil. When worms excrete castings, they reintroduce these nutrients to the surrounding soil.

This symbiotic relationship helps recycle key nutrients throughout the soil and nourish plant roots. It’s okay to buy earthworms for your garden if you can’t easily attract worms to your yard. However, you can attract them by maintaining soil moisture, applying mulch, and using organic fertilizers. Avoid using synthetic fertilizers and pesticides, as it might limit the earthworms in your garden.

5. Indicates How Healthy Your Garden Is

In many ways, earthworms serve as a litmus test in any yard or garden. You can tell that your garden is in good shape if you find earthworms in and around your soil beds. A lack of earthworms should concern you if they’re typically abundant in your ecosystem. That’s because no earthworms is a sign that something is wrong with your garden.

For example, earthworms avoid areas rich with pesticides, herbicides, fungicides, and other chemicals. Frogs and other beneficial animals and organisms also avoid harmful chemicals and toxins. You also won’t find earthworms in your garden if the soil is barren and devoid of key nutrients, like nitrogen and potassium. Pay attention to how many earthworms you find in your yard and think about what you can do to improve it.

How To Protect Earthworms In Your Yard

You won’t get to experience the many benefits earthworms offer if your yard is inhospitable. You can protect earthworms and attract more to your yard by following a few steps, including:

Avoid Heavy Foot Traffic After It Rains

Have you ever noticed how many worms come out after it rains? That’s because worms love moisture. Keep that in mind when you're walking around your yard and garden after a rainfall. Otherwise, you could accidentally squash earthworms beneath your feet. Don’t mow the lawn or put heavy equipment on the grass when it's damp. That way, you won’t compress the soil, contribute to compaction, or crush earthworms.

Go Natural

The chemicals in pesticides and other commercial gardening products are extremely harmful. Many of them are harmful for humans, bugs, and animals alike. Earthworms are vulnerble to pesticides, weed killers, and other commercial products. The earthworms in your garden will eventually leave if you keep using harmful chemicals. Instead, use natural methods to deter pests. Plant some marigolds, mint, citronella, rosemary, and thyme to keep bugs away instead of using chemicals. 

Don’t Dig Too Deep

Digging too deep and tilling the soil can expose and or kill the earthworms in your garden. If you do dig some worms out of the ground, cover them with some dirt before moving on. That way, predators won’t easily find and kill them. Worms travel through tunnels, and tilling and digging can destroy them. Use a garden fork to till your soil instead of a rototiller, as rototillers can kill worms and destroy their tunnels. Worms will ultimately aerate your garden naturally, so you must protect them.

Feed Them

Worms won’t stay in your garden for too long unless they have plenty of food sources. They can always eat the microorganisms in the soil, but you should give them enough healthy organic matter that will keep them in your yard.

Compost is the best option, so you should start composting if you haven’t already. Otherwise, you can scatter coffee grounds, egg shells, grass clippings, and vegetable scraps. Mix the compost, shells, and grass clippings with the topsoil to feed your local earthworms.

Maintain Moisture

All the earthworms in your yard will eventually dry out and die if they don't have enough moisture. Worms breathe through their skin, but only when it's damp. This is the main reason why you find dry, flattened worms on concrete driveways and sidewalks. Worms rely on moisture to breathe and move through the soil in your garden without much resistance.

Research all your plants and see how much water each of them needs. Group your plants accordingly and water them on a routine schedule. The parts of your yard that get the most water are more likely to attract earthworms. Install a sprinkler system to keep your lawn damp and water your soil beds by hand if necessary.

Summing It Up

Earthworms are great for gardens because they help reintroduce vital nutrients into the soil. They also aerate the soil by making tunnels, which can also help strengthen the soil structure and drainage. You can attract earthworms by keeping your garden damp, composting, and avoiding chemical frtilizers, pesticides and herbicides.

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