The Benefits of Using Eggshells in Your Garden

Eggshells are a great way to enhance your garden. They provide calcium for your plants and help prevent blossom end rot in tomatoes and peppers. Crushed eggshells can also be used as a natural pest deterrent and added to compost for nutrient-rich soil.


Nutrient-rich soil amendment

Eggshells are a great natural source of calcium and other minerals that can provide amazing benefits to your garden. Using this waste product as a soil amendment is not only environmentally friendly but also very effective in improving soil quality and promoting plant growth. Eggshells can help with important nutrients like calcium, potassium, and magnesium deficiencies, which can often cause significant problems for gardeners.

Calcium benefits

Calcium is one of the most essential minerals for plants as it is involved in many cellular processes required for healthy growth and development. By adding eggshells to your soil, you’ll be providing plants with an excellent source of calcium which has many benefits such as:

Increased cell growth

Calcium plays a critical role in the development of plant cells. This mineral helps in cell division by encouraging the formation of new cells, leading to increased plant growth and healthier foliage.

Stronger cell walls

Calcium also contributes to stronger cell walls in plants. The stiffness of the cell wall determines how resistant cells are when faced with external pressures such as disease or pests. A deficiency in calcium makes the plant’s cells less rigid making it more vulnerable to damage.

Other minerals

Besides aiding calcium deficiencies, eggshells can provide additional essential minerals that are important for healthy plant growth including potassium and magnesium.

Added potassium

Potassium helps with water balance within the plant’s tissues allowing better uptake of nutrients by roots leading to better overall gardens health.

Added magnesium

Magnesium supports photosynthesis, contributing energy boost necessary for blooming flowers.

Adding crushed eggshell on topsoil allows an easier way for these essential nutrients providing bigger results days through months after testing their effectiveness each season.

pH-balancing effects

The pH level is significant since an imbalance means failure with nutrient absorption among others based from what the plants need. Eggshells come very practical since they have both alkalinity and acidity.

Neutralizes acidic soil

Acidic soils are caused by a higher concentration of hydrogen ions, making it difficult for plants to access vital nutrients, including calcium. The natural alkaline properties of eggshells can help neutralize these strong acids in the soil.

Prevents nutrient leaching

Leaching occurs when mineral salts are dissolved in water such as rainfall, leaving the soil nitrates less effective for plants to absorb nutrients. For instance, gardeners that had excessive rain periods saw their cultivated soil depleted of what they thought was enough nutrition since they did not calculate the amounts their actual plant’s needs. By adding a layer or tilling eggshells down into your garden bed/plot you’ll be holding key minerals close to roots and helping enhance below surface growth in addition to reducing leaching.

What is Eggshell?

Eggshell is the hard, outermost layer of an egg that protects the yolk and albumen (egg white). [Wikipedia]

Natural pest control

Using eggshells in your garden not only adds nutrients to the soil but can also be used as a natural pest control method. Eggshells are full of calcium, which is essential for plants to grow and thrive, but at the same time, they can act as a repellent for certain pests.

Repels snails and slugs

One of the most common garden pests that can wreak havoc on your plants are snails and slugs. They may look harmless but can cause significant damage by munching on leaves and stems. Luckily, eggshells can help keep them away.

How it works

Snails and slugs move by gliding their bodies across surfaces. When they come into contact with the sharp edges of crushed eggshells, it causes discomfort to their soft bodies, deterring them from continuing further. Additionally, the calcium carbonate in eggshells reacts with their slime secretions causing dehydration.

How to apply

To use eggshells as a pest control method for snails and slugs:

  1. Collect eggshells: Rinse out used eggshells with water and allow them to dry completely.
  2. Crush the shells: You can use either your hands or a rolling pin to break up the shells into small pieces.
  3. Spread around plants: Sprinkle the crushed shells around your plants’ base where they are most vulnerable.

You could also blend dried eggshells into a powder form by using a food processor or coffee grinder if you prefer not having visible shards scattered around your garden.

Deters other pests too

Eggshell’s sharp edges make it uncomfortable for some other crawling insects besides snails and slugs which includes:

  • Ants
  • Caterpillars
  • Earwigs
  • Fleas
  • Cutworms
  • Beetles
  • Mealybugs
List of pests
  • Ants are driven away from your plants by the sharp edges of eggshells and get confused with the powder result of crushing which disturbs their scent trails, making it harder for them to find their way back.
  • Caterpillars will not cross over jagged eggshell pieces placed around your plants since they have soft bodies that can get hurt easily.
  • Earwigs’ fragile exoskeletons are no match for crushed up eggshells that make tiny cuts on their skin and can cause death through dehydration.
  • Fleas similarly to ants do not like how the shell powder feels underfoot, either becoming agitated or avoiding contact with places where eggshells exist.
  • Cutworms that prefer chewing through tender vegetation are also deterred since they cannot grip onto these jagged surfaces
  • Beetles as one example, cucumber beetles or potato beetles are repelled by the stench of rotten eggs, therefore hiding crushed shells under these plants is an effective barrier technique.
  • Mealybugs do not enjoy crawling over abrasive surfaces of eggshells, depriving them of access to new plants.
How eggshells repel them

As previously mentioned, different pests detest several elements in eggs. To understand further:

  • The jagged shape: Any insect’s delicate body can quickly be harmed or torn apart if it rubs against a sharp-edged object.
  • Calcium carbonate: When bugs crawl over powdered shell fragments or come into contact with moist particles, calcium carbonate releases carbon dioxide gas while neutralizing acidic internal fluids within pests’ digestive tracts.
  • Aromas given off: Some insects don’t like particular scents produced by eggs at various stages in decomposition.

One thing to note is that Eggshells do not necessarily kill pests; They just encourage them to flee your garden patch.

By using organic methods such as utilizing crushed eggshells instead of store-bought synthetic chemicals, you can protect your garden while keeping your produce pure. Not only does it keep pests at bay, but it also envelops various other benefits like providing calcium to your plants to help them grow, reducing soil compaction and adding nutrients that promote healthy cellular regeneration.

To conclude, using eggshells in the garden is an excellent way of ensuring the safety of homegrown produce while deterring pests naturally.

Next time before tossing away those shells, consider adding them to your helpful arsenal against garden pests.

Improves water retention

Eggshells are not only a great source of calcium for your plants, but they can also improve the water retention of your soil. Here’s how:

Porous surface

Eggshells have a porous surface that allows them to absorb and hold onto moisture in the soil. This means that when you add crushed eggshells to your garden, they will help your soil retain more water over a longer period of time.

Why it’s important

Water is essential for the health and growth of plants. Without enough water, plants can become stressed and produce lower yields or even die. By improving the water retention of your soil with eggshells, you can help ensure that your plants have access to adequate moisture throughout their growing season.

How it works

When eggshells are added to soil, they create tiny air pockets within the soil structure. These air pockets allow for better drainage and increase the soil’s ability to hold onto moisture. Additionally, as water evaporates from the soil, it will be absorbed into the porous eggshell particles, which will then release moisture back into the soil as needed.

Affects soil texture

Eggshells also play a role in improving the texture of different types of soils.

Soil types improved

For example, adding eggshells to clay soils can help break up heavy clay particles and make them more porous, allowing for better drainage and improved root growth. In sandy soils, eggshells can increase water retention by providing additional pore space within the larger sand particles.

Additionally, because plant roots need air as well as water to grow properly, improving overall soil texture can lead to healthier root systems and more robust plant growth.

Indirect impact on water retention

Another way that eggshells indirectly improve water retention is through their effect on soil pH levels.

Many plants prefer slightly acidic soils with a pH between 6 and 6.5. Over time, however, the use of synthetic fertilizers and other chemical treatments can cause soils to become too acidic or too alkaline for optimal plant growth.

Eggshells can help balance soil pH levels due to their calcium carbonate content. As the eggshells break down in the soil, they release calcium and other micronutrients that can neutralize acid soil conditions.

By maintaining a healthy soil pH level, plants are better able to uptake water and nutrients from the soil, leading to improved water retention and overall growth.

Encourages healthy plant growth

Eggshells are a valuable resource that can be used in the garden. Not only do they help reduce household waste by providing an alternative to throwing shells in the trash, but they also offer numerous benefits for plant growth and health.

Calcium again

Eggshells are primarily composed of calcium carbonate – a mineral that plays a critical role in plant cell division, growth, and development. When plants lack sufficient amounts of calcium, their leaves may turn brown or yellow, new shoots may wilt or die off, and fruit and vegetables may fail to develop properly.

Incorporating eggshells into your garden soil can provide your plants with essential calcium they need for optimal growth. Grinding up dry eggshells into a fine powder or soaking them to create eggshell water are both excellent ways to unlock this calcium boost.

Plant-related benefits

Along with boosting calcium levels in soil, using eggshells also has several other benefits for your plants. Here are some additional advantages of incorporating eggshells into your garden:

  • Eggshells can improve soil structure: By adding finely ground-up shell material into biochar or compost earthworm castings mixture you’ll create an enriched growing medium, with enhanced drainage abilities and better water retention capacity.
  • They can deter pests: Eggshell fragments added around sensitive seedlings or sprouts will act as barriers against tiny slugs worms crawling insects and even household ants attracted by sweet nectarines.
  • They promote seed germination: The powdery texture of ground-up eggshells makes it easy for seeds to germinate since such grounds allow better oxygen exchange between itself and the seeds.
How to take advantage

There are various ways you can incorporate eggshells into your garden’s ecosystem effectively:

  • Crushed Egg Shells as soil nutrients: Begin by collecting clean empty shells from home cooking use (do not contaminate by putting useless eggs, use only organic eggs). To prepare them for the garden, crush the shells into small pieces and add one tablespoon per square foot of soil. Then mix it well with top 2-3 inches of soil covering plant roots.
  • Eggshells infused water: Infusing eggshells in water overnight or longer can extract the calcium needed to boost plant growth. Add a half dozen crushed shells to a gallon of water and let it sit for about a week or until it turns yellowish, then sprinkle this solution onto your plants weekly at early morning hours when is cooler (e.g., Tomatoes, peppers love this.)
  • Pickling Calcium Solution: Another excellent method could be boiling egg shells in distilled vinegar-rich acid solution that dissolves all minerals from the shells forming a unique bioavailable organic fertilizer with such high concentration proportionally higher than bone meal called pickled calcium.

Other micronutrients

Eggshells are not just an excellent source of calcium; they also contain other critical micronutrients necessary for plant growth and health.


Plants require various hormones to develop healthy root systems and produce prolifically. One purest form hormone-like substance abundant in eggshells is Chitin – originating from crabs clean waste leftover used as food animal compost – that boosts root initiation speed improving productivity longevity cell membrane renewal Greening trichomes number decrease stress naturally hardness resistance making fruit more colorful, sweet-tasting with long shelf life other potential benefits generally activating natural defences against pests invasion split-prone fruits’ disorders like wilting – they become stronger healthier thus avoiding costly harmful synthetic chemical usage.

Boosts plant immunity

Eggshells add a mineral boost to your garden’s ecosystem while fighting off infections in plants simultaneously. The inclusion of bacterial cultures (Lactobacillus) isolated from spent coffee grounds undoubtedly complements these properties too as it fosters beneficial microorganisms in soil that generates the disease suppression and plant booster benefits.

Incorporating eggshells into your garden can benefit your plants significantly, but it’s essential to remember not to overdo it, as too much calcium can be harmful to some crops such as potatoes, berries apply at a rate you feel safe with then measure first before any change. With this precious garden addition made from used shells – often discarded thoughtlessly by most – you’re doing both the environment a favour. Give eggshells recycling and a gardening-inspired new life today and take advantage of the rewards for yourself!

Easy and cost-effective

Using eggshells in your garden is an easy and cost-effective way to improve the health of your plants. By adding eggshells to your soil or using them to create a tea, you can provide your plants with essential nutrients like calcium and potassium.

Sourcing eggshells

Before you can use eggshells in your garden, you need to source them. There are two main ways to do this:

From the kitchen

The first option is to save the eggshells from your own kitchen. Every time you cook with eggs, save the shells instead of throwing them away. Rinse them out with water and let them air dry before adding them to your collection.

From local bakeries

If you don’t eat eggs regularly, you can also ask local bakeries if they would be willing to give or sell their eggshells to you. Many bakeries go through a large number of eggs each day and may have a surplus of shells that they would be happy to get rid of.

Preparing eggshells

Once you have collected enough eggshells, it’s time to prepare them for use in your garden. There are two main methods for doing this:


The first method is sun-drying. Simply spread out the collected eggshells on a flat surface and place it in full sun for several days until they become dry and brittle.


Once the shells are dry, break them up into small pieces – either by hand or using a blender – so that they will decompose more easily when added to soil.

Application methods

Now that your eggshells are ready, it’s time to start using them in your garden! Here are two simple but effective application methods:

Add to soil

One way to use eggshells in the garden is simply by adding crushed shells directly into the soil around your plants. This is particularly beneficial for tomatoes, peppers, and other plants that are prone to blossom end rot, as the calcium in eggshells helps to prevent this condition.

Create a tea

Another way to use eggshells is by making a tea. Simply fill a large container – like a five-gallon bucket – with crushed eggshells and water, then let it sit for several weeks until it turns into a brown liquid. Strain the liquid out of the shells and dilute it with water (a 1:4 ratio) before using it to water your plants. This method is particularly effective at providing slow-releasing nutrients to your plants over time.

By using eggshells in your garden, you can improve soil health while also reducing waste and saving money. So start collecting those shells today!

Reduces waste in the kitchen and garden

Eggs are an essential part of any kitchen. They are a staple in most households due to their versatility and nutritional value. However, after using them, we often end up with eggshells that we consider as useless waste. Most people will immediately throw these shells away without giving them a second thought. But what if I told you that eggshells could be of great benefit to your garden?

Environmental impact

The issue with waste

Waste is a significant problem that is affecting our planet today. As the world population continues to grow, so does the amount of garbage produced daily. Waste disposal facilities are increasingly becoming overwhelmed, leading to landfills becoming larger and more hazardous. This growth in landfill areas leads to increased carbon emissions, which contribute significantly to climate change.

Eggshells as a solution

Using eggshells can help reduce the amount of waste generated from your kitchen significantly. Instead of throwing these shells away, they can be used for various purposes around your household; gardening being one of them.

By using eggshells in gardening, you not only prevent them from contributing to the ever-growing landfill sites but also create helpful solutions for plant growth while reducing chemical fertilizers’ usage.

Composting with eggshells

Composting is a simple way to recycle organic matter at home effectively. It involves turning kitchen scraps into nutrient-rich compost used in gardening or landscaping. Eggshells play an important role when making compost as they add valuable minerals such as calcium, magnesium and potassium.

The benefits
  • Improves soil quality: When added along with other compost materials such as vegetable peels or grass clippings, it creates fertile soil perfect for nourishing plants.
  • Pest protection: Crushed eggshells make excellent pest repellents by deterring pests like snails and slugs that may feed on plants.
  • Promotes plant growth: The calcium and potassium in eggshells help plants grow stronger and healthier. These minerals also prevent common problems such as blossom end rot commonly seen in tomatoes, peppers and other vegetables.
  • Environmentally friendly: Composting with eggshells reduces the need for chemical fertilizers used to enhance plant growth, hence saving you money in the long run while reducing environmental pollution.
Best practices

While using eggshells is beneficial when making compost, it’s important to follow some best practices.

  • Rinse the shells thoroughly under running water before adding them to your bin or compost pile.

  • Crush the shells into small bits; this will speed up decomposition while preventing clumping together.

    Cross-compost with other organic matter like vegetable leaves, grass cuttings to create nutrient-rich soil easily absorbed by your garden’s roots.

  • Avoid using too many eggshells at once. Excess amount of crushed shells may cause pH imbalance leading to slow fermentation or bad smell on your compost pile.

Enhances Soil pH Levels

Eggshells, despite their simple and unassuming appearance, are packed with nutrients that plants need for healthy growth. That is why many gardeners including eggshells in their list of fertilizer sources. The main benefits of using eggshells lie in their alkalizing effect on the soil and high calcium carbonate content.

Alkalizing Effect

An alkaline soil has a pH level above 7.0 on the pH scale, indicating a low acid concentration. Most vegetables and fruits require slightly acidic soils with pH levels ranging from 6.0 to 7.0 while some flowers prefer more acidic growing conditions with pH levels between 5.0 and 6.0 [1]. If the soil is too acidic, it can affect nutrient availability for plants by making them less soluble or even toxic. This issue can be fixed using various methods such as adding dolomite lime that reduces acidity while providing magnesium and calcium nutrients essential to plant growth.

However, there’s an easier and cheaper alternative – using eggshells as a natural alkaline source to adjust the soil’s pH level! Eggshells have a powerful alkalizing effect thanks to their high calcium carbonate content that quickly neutralizes excess acidity as well as improves texture by promoting better air circulation and water drainage.

How it Works

When you add eggshells into your garden soil, they help release carbon dioxide gas which reacts with water to form bicarbonate ions (HCO3-) alongside calcium hydroxide (Ca(OH)2). These materials react with hydrogen ions (H+) in the soil solution thus increasing its alkalinity by raising the pH level toward neutrality at 7 or slightly above it [2]. Therefore, the amount of eggshell powder needed depends on how much you need to increase your current ph level.

A good way to determine the pH level of your soil is by using a soil test kit. Once you’ve confirmed that your garden soil’s pH is low, you can then determine the appropriate amount of eggshell powder to mix into the soil. For example, if your pH level reads 5.5, a pound of eggshells per hundred square feet should raise it to around 6.8 [3].

Benefits for Plants

Adding eggshells into the soil has significant benefits for plants. First, they help increase nutrient availability by creating an optimal growing environment that improves ion exchange in the soil solution.

Secondly, eggshells release calcium slowly over time, which promotes strong cell growth and stimulates root formation leading to more significant harvests.

Finally, alkaline soils resistant to pests such as slugs in contrast acidic soils attract these insects due to their unique aroma. Eggshells apply as organic pest control as they create an environment that repels them from eating leaves and fruits.

Calcium Carbonate Content

Eggshells contain approximately 94% calcium carbonate -a compound known for its ability to neutralizey orthochromatic acids capable of causing harm not only plant growth but many aquatic pets in farmers’ pondswhich makes them skillful weed suppressors[E7]. The high calcium content also contributes significantly to seed development by promoting stronger cell walls and enhancing overall plant structure.

The Science behind It

During photosynthesis where plants produce food (carbohydrates) and oxygen using carbon dioxide from both air and dissolved bicarbonate found in water absorbing through roots for some crops like grapes(knowing this specific example will need reference )the use of bicarbonate means photosynthesis occurs faster. Aside from this fact eggshells are preferred because bees accomplish adequate pollinationwhen flower structures are strong enough against external effectsof weather justifying how vital strong stems(and outer leaf protection)are needed[4]

Using powdered or crushed eggshells for garden mulch is one of the most efficient ways to add extra calcium carbonate into your soil. Once you’ve collected enough shells, dry them outdoors in the sun or oven until completely dry. Let cool and crush them before adding to the soil or compost bin.

Using Eggshells for Lime-Demanding Plants

Some plants require a higher pH level than others – making it hard to grow them in highly acidic soils. Using eggshells can provide an excellent solution because they are a natural liming material that won’t harm your plants once balanced. One such example is raspberries which requires a pH level between 6.0 to 32 for maximum growth yield[5].

Although some localities may present better results using other minerals, in general, the use of eggshells produces dynamic acidity correction that benefits all types of plants when applied in moderation,” advises Jackson [3]

For best results, mix crushed eggshells with standard potting soil or compost before planting lime-loving plants like tomato and pepper varieties, ornamentals like roses requiring acidic soil below pH 7,and veggieslike those mentioned above with calcium-intensive root formations.

Improves soil structure and aeration

Soil structure

Soil structure refers to the arrangement of soil particles into small clumps, called aggregates. The spaces between the aggregates allow for water drainage, air movement, and penetration by plant roots and other organisms. Good soil structure helps the soil hold onto nutrients, making them available to plants over time.

Importance for plant growth

Healthy soil structure is critical for good plant growth and overall garden health. When soil is compacted or composed primarily of very fine particles such as clay, gardeners often struggle with poor drainage and low oxygen levels that can negatively impact the roots of their plants leading to stress and death.

How eggshells improve structure

Eggshells may seem like an unlikely asset in fixing problematic soils but they are great natural amendments that can significantly enhance garden soil. They contain valuable minerals like calcium carbonate, phosphorus, magnesium, potassium, nitrogen and other elements that have been added to promote strong cell wall development in growing chicks inside their shells.

When crushed eggshells are worked into garden beds or added to pots or containers before planting season begins they will help loosen heavy clay soils allowing for better aeration. Over time as they decompose they release minerals into the surrounding dirt providing numerous benefits to plant life below.

  • By increasing pore space in the rhizosphere of your garden plants you can reduce waterlogging which means less erosion/swirling effects on your seedlings.

  • Improved structural stability not only makes your soil better suited for plants but also more resistant against environmental factors like wind erosion.

  • Eggshells can absorb significant amounts of lead in contaminated soils acting as natural chelators.

    Incorporating ground up eggshells into gardens is therefore essential because most gardening soils benefit from calcium supplementation provided naturally by the eggshells.


Aerated soil has lots of air pockets between spaces occupied by nutrient-dense soil particles. Plant roots require oxygen for cell respiration, a vital energy-generator for photosynthesis. When soil air space is restricted due to compaction or high density of smaller clay pieces it can limit water infiltration and restrict root growth.

Why it’s important

Adequate soil aeration provides plants’ roots with the necessary quantity of gas that is pivotal for their metabolic processes which in return improves plant vigor and growth by producing more robust, fibrous root systems.

Compaction issue and how eggshells help

Soil compaction is an obstacle to growing healthy vegetables, herbs, and fruits. It takes place when repeated foot traffic or animal digging leads to the reduction of pore spaces among dirt particles in soils leading to inadequate airflow through compacted channels. This is where eggshells show their worth as a garden amendment adding air space back into the earth which encourages water movement through the soil as well as better development of root cells.

By crushing eggshells and incorporating them into compact soils, you can improve drainage, enhance water retention capacity and promote the dispersal of plant nutrients over time. It’s best practice to crush or pulverize eggshells so they don’t cause injury but add benefit by boosting organic matter content which attracts microbes that will aid in breaking down other organic material.


Using ground up Eggshells apply multiple benefits on your Garden Soil by imparting Calcium supplementation in natural form along with aeration properties carried inside them resulting in stronger root system development within plants giving way for Healthy Foliage to grow over time making them essential yet sustainable component for your Garden Needs.

Scroll to Top