Are Eggshells Good For Your Garden Soil?

Did you know that eggshells can work wonders for your garden soil? In this insightful blog post, we reveal how eggshells can improve soil quality and provide essential nutrients for your plants.

Dive into the science behind these natural soil enhancers and explore other organic waste materials like banana peels and coffee grounds that can be used to boost your garden’s health.

Embrace a greener lifestyle by turning everyday waste into valuable resources for your garden. Read on and unlock the full potential of eggshells in your garden soil today!

Eggshells can be a beneficial addition to garden soil due to their calcium content.
Rinse and dry eggshells before crushing them into small pieces and mixing them into your garden soil.
Eggshells are particularly helpful for plants that require calcium, such as tomatoes and peppers.
Crushed eggshells can be added to garden soil once or twice a year, depending on the needs of your plants.
While eggshells can attract pests like slugs and snails, this is not a common issue when they are crushed into small pieces before use.

Are Eggshells Good For Your Soil?

The answer is yes! Eggshells are a good source of calcium, phosphorus and potassium. They also contain magnesium, zinc, and iron. You can even use the shells as fertilizer in your garden or potted plants.

To use eggshells as fertilizer:

  • Pulverize the shells into small pieces (you can do this by placing them in a plastic bag and hitting it with a hammer)
  • Put them into your compost bin to add calcium to the mix
  • Use dry eggshells directly onto plants as an organic fertilizer

“Burnt leaves can be a valuable addition to your garden soil, as they can add important nutrients to the soil and help with water retention. Check out our article on how burnt leaves can benefit your garden soil.” – Are Burnt Leaves Good for Garden Soil?

What Do Crushed Eggshells Do?

Crushed eggshells are a great source of insoluble fiber, which helps loosen the soil and keep it from compacting. This is beneficial because it allows water to seep into the soil more easily and helps prevent harmful fungus from taking hold.

In addition to calcium carbonate, crushed eggshells are also a good source of insoluble fiber. This insoluble fiber means that your plants will have an easier time absorbing nutrients like iron, magnesium, copper, and zinc as well as phosphorus and potassium.

How Do You Break Down Eggshells In The Garden?

As you may recall from your high school science classes, eggshells are made of calcium carbonate, which is a hard mineral that doesn’t decompose easily. The plant roots take up the calcium and other nutrients through their pores in the soil. 

When you apply eggshells to your garden, these minerals are slowly released into the soil over time. This means that planting seeds or seedlings after adding eggshells can help them get off to a good start without suffering from nutrient deficiencies during their first few weeks of growth.

The process of breaking down calcium carbonate into calcium and carbon dioxide takes time much longer than it would take for a high-nitrogen fertilizer like blood meal or fish emulsion to do its job in plants’ roots. 

Because this process involves both physical breakdown and chemical reactions between soil microbes and plant roots (which don’t happen quickly), eggshells make excellent slow-release fertilizers for both container gardening and regular beds in your backyard garden!

“Don’t throw away your orange peels! They can be a great natural fertilizer for your garden soil, as they contain important nutrients like nitrogen and potassium. Learn more about how orange peels can benefit your garden soil in our article.” – Are Orange Peels Good for Garden Soil?

When Should I Add Eggshells To My Garden?

While eggshells are a great and easy way to add nutrients to your garden soil, it’s important to know when it’s appropriate to use them.

Here are some times when adding eggshells can be effective:

When you notice your plants are struggling – Eggshells will help give your plants more calcium at this point in their growth cycle, which is especially important for leafy greens like broccoli and spinach. 

Adding eggshells when the plants are struggling will help revive them if there’s been a drought or other weather change that has made it harder for the plant to thrive in the ground.

When you’re ready to fertilize – If you plan on fertilizing with an all-purpose fertilizer, adding crushed-up shells beforehand may speed up the process of improving soil health by providing an extra boost of calcium right away instead of waiting until later (if at all). 

Eggs have a high concentration of calcium so they’ll give your garden quick results!

Before planting seeds – This can also be done by crushing up shells into small pieces before mixing them into compost.

Or potting soil is another option since this method is less messy than using whole eggs directly onto bare dirt surfaces without covering them first which could lead down paths such as “Where did my watering can go? Oh, wait! It looks like someone spilled oops.

“Leaves are a free and easily accessible resource that can benefit your garden soil in many ways. They can add important nutrients, help with water retention, and even prevent soil erosion. Check out our article to learn more about how leaves can benefit your garden soil.” – Are Leaves Good for Garden Soil? Explained

Can I Add Too Many Eggshells To My Soil?

As with anything, it’s important to not overdo eggshells in your garden. Eggshells are a great soil additive, but they can also add too much nitrogen to the soil. 

If you add too many eggshells and not enough other materials to balance them out, the result could be excessive growth at the expense of nutrients and water absorption.

To prevent this from happening in your garden bed, try adding some sand or peat moss along with eggshells when you’re preparing new soil for planting. This will help offset any potential imbalance caused by adding too much calcium carbonate (the main component of egg shells).

However and this is important if your existing soil contains an abundance of calcium carbonate already (for example if you live in an area where limestone is prevalent), then adding more might not pose as much of a problem!

Should You Rinse Eggshells Before Using Them As Fertilizer?

Eggs are one of the best sources of calcium, phosphorus, and potassium. They also contain magnesium and sulfur. These are all essential nutrients for healthy plants.

However, eggshells are acidic by nature. If you use them as fertilizer without rinsing the shells first, they may result in an alkaline soil that’s not ideal for growing plants or vegetables. 

This can cause nutrient deficiencies if you’re using eggshells that haven’t been rinsed before applying them to your garden. 

Rinsing will ensure a balanced mix of nutrients for plants in your garden plot or greenhouse bedding area when added at recommended levels (3/4 cup per cubic foot).

“Worms are a gardener’s best friend, as they can improve the structure of your soil and help with nutrient cycling. Learn more about how worms can benefit your garden soil in our article.” – Are Worms Good for Garden Soil?

Can You Put Freshly Cracked Eggs Into Your Garden?

The answer is no. You don’t want to put freshly cracked eggs into your garden soil. If you have some freshly cracked eggs and want to use them as fertilizer, go ahead and get rid of the egg white first. 

You can throw it out or try to compost it, but you should definitely not put it in your garden soil as-is.

The reason why freshly cracked eggs are bad for your soil is that they contain the same nutrients as eggshells but they’re too acidic to use in the garden because they will burn plants’ roots! 

So if you’re looking for an easy way to get more calcium into your garden without spending a lot of time crushing up those shells (or if you just don’t feel like doing that), then make sure that all of the whites are removed before breaking down into fertilizer is going to be key here!

Do You Need To Crush The Entire Shell Or Can It Be Done With Half Of It?

Crushing the eggshells is not necessary. If you do want to crush them, you can simply put them in a garbage bag and roll over them with your foot or stomp on them. 

You don’t need to break the shell into pieces; just make sure it’s broken enough so that it will easily break down into powder when added to your soil.

How Long Does It Take For Egg Shells To Break Down In The Garden?

Eggshells are made of calcium carbonate, which is a material that breaks down when it comes in contact with water and soil. Eggshells will break down faster in the presence of soil because the eggshells contain pores that allow for bacterial activity. 

You may also notice a change in color as the egg shell breaks down. This happens due to oxidation (the process by which substances combine with oxygen). 

In addition to breaking down faster when left out in nature, some people think they can speed up this process by soaking their shells overnight before adding them to their garden soil.

“Pecan shells are a natural and sustainable fertilizer that can benefit your garden soil in many ways. They can help with water retention, add important nutrients to the soil, and even repel pests. Learn more about how pecan shells can benefit your garden soil in our article.” – Are Pecan Shells Good for Garden Soil? Find Out Now


If you’re looking to add egg shells to your garden, then we recommend using them as soon as possible. 

Eggshells are an organic and natural way of improving the soil in your yard or garden bed without having to use any harmful chemicals or pesticides. Eggshells are high in carbon and nitrogen which makes them perfect for plants that need this kind of fertilizer

Further Reading

How to Use Eggshells in Your Garden and in the Yard – Southern Living provides an in-depth guide on how to use eggshells in your garden, including tips on how to prepare them and which plants can benefit from them.

How to Crush Eggshells for Your Garden – This YouTube video demonstrates how to crush eggshells for use in your garden, with tips on how to make the process easier and more efficient.


1. How do I prepare eggshells for use in my garden soil?

To prepare eggshells, rinse them thoroughly and allow them to dry. Once dry, crush them into small pieces and mix them into your garden soil.

2. Which plants benefit most from the use of eggshells in garden soil?

Eggshells are beneficial for a wide variety of plants, but they are particularly helpful for plants that require calcium, such as tomatoes and peppers.

3. How often should I add eggshells to my garden soil?

It’s recommended to add crushed eggshells to your garden soil once or twice a year, depending on the needs of your plants.

4. Can eggshells attract pests to my garden?

While it’s possible for eggshells to attract pests like slugs and snails, this is not a common issue. To minimize the risk, crush the eggshells into small pieces before adding them to your garden soil.

5. Are there any plants that should not be fertilized with eggshells?

Eggshells are generally safe for use on all plants, but it’s always a good idea to research the specific needs of your plants before adding any new fertilizers to your garden soil.