How to Use Eggshell as Fertilizer (Step-by-Step Instructions)

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How to use eggshell as fertilizer? In this guide, we shall discuss this matter. You are welcome to read us till the end. Our experts show you 5 effective ways to use the crushed eggshells in the garden.  

It may sound funny! But, you would be blessed to know that you can use Eggshells in the garden and help the plants grow effectively. It is one of my schedules to collect eggshells and use them in the garden as fertilizer. Besides, we have got these eggshells very beneficial as organic pest control medicine. 

You never know how essential these eggshells for your plants! Collect them, rinse them, and then place them in an open container. You should dry them out! 

Be mindful of collecting the eggshells in a container. When the container is full, start pulverizing them and turn them into minutiae! You should pulverize those using wooden spoons. The more shells you collect, the more compatibility tilled into the soil and around the plants. 

3 ways to use eggshell for!

  • Use eggshell as fertilizer 

How to use eggshell as fertilizer? It is the most trendy question among enthusiasts! Once upon a time, I was one of them who felt knowing this matter. However, the eggshells provide Calcium to the soil and help the plants with their healthy bones. In the soil, essential ingredients like nitrogen, phosphorus, and potassium are highly reserved. Without these ingredients, you can’t think of a plant’s healthy growth. Once applying eggshells in the soil, it works the same as fertilizer and establishes the cell walls. The eggshells introduce high minerals into the soil. Before using these shells as fertilizer, you are requested to grind them with a grinder and turn them into a pestle. Ground them into the soil. Within several months, the eggshells are tilled into the soil and be absorbed by the plant’s roots. Indeed, it takes more time than commercial fertilizer to mix into your soil. Even if a late process, the eggshells are an organic matter to help new plants thrive. You can add coffee grounds with the eggshells as the coffee grounds are enriched in nitrogen. The significant thing that eggshells do is to reduce the acidity of your soil.

  • Eggshells work like seed’s tub

I have researched these eggshells and got them appropriate for the ‘Seed starters.’ Eggshells are biodegradable and create opportunity as the deeper shell halves. Do you want something excellent to happen with the seeds? Sterilize the eggs! Then, try to make a drainage system at the bottom of the eggshells. You can significantly add soil and seeds into the eggshell and wait for a complete result!

  • Eggshells are the enemy of all pests! 

The smells of the albumen are bad for the pests! They’ll stay away if you make a coating of crushed eggshells and spread them around the garden. Most of the enthusiasts keep the eggs inside the deter deer. The plants are most affected by the pests and the deer, no? Eggshells can be a good restrictor for them. We recommend not using eggshells if growing your plants inside or near the house. The use of eggshells can be determined as a slug repellent. If you’re one of them who have been using eggshell’s idea as slug repellent, let us know! Comment below.

Benefits of the eggshells

Benefits of the eggshells

Eggshell plant fertilizer has lots of benefits! Hopefully, you know better about it! Even if you are not aware of eggshells’ benefits, be mindful of crack a few eggs and toss away the shells. Grinding the eggshells can be an inexpensive source of fertilizer. Your plants will get synthetic fertilizers through the eggshells in your garden. It is mandatory to know that eggshells only won’t provide adequate nutrition for plants. Let’s make a nutritional analysis below! 

  • Eggshells contain calcium carbonate in them. The ingredient (calcium carbonate) is usually found in agricultural lime. You will be benefited from essential garden remedies throughout the Eggshells. It is to mention that the nutritional properties of eggshells work significantly to determine the plant’s growth. Once grinded, the eggshells are infused with 4 mg of Calcium and potassium. These shells contain small amounts of phosphorus, magnesium, and sodium.
  • You can make eggshell fertilizer tea and sprinkle them in your garden. How to make eggshell fertilizer tea anyway? Boil a gallon of water and add 20 organic eggshells for a more potent brew. It would help if you kept them overnight. You will get the tea ready in the morning. The tea is enriched with Calcium and potassium. You can do this process once a week in your garden. It will be appropriate to do twice only if your family’s egg-eating habits are good!
  • You can sprinkle eggshells tea or crush eggshells and spread them to the soil. Collecting more shells throughout the winter will help you grind them and use the same fertilizer. It would help if you went grinding after washing and drying the surfaces for longer. The process will eliminate egg residue. It will be a great idea to process these shells in powder forms. We recommend wearing a dust mask when crushing the eggshells. During this Covid-19, it is required to wear a mask anyway. Plus, you’ll be protected through not breathing the eggshell dust ever. All you need to do is mixing the powdered shells into the potting mix or the soil. Do this before planting!
  • Plants of your garden need Calcium to thrive. Calcium develops the cellular structure of a plant. Young plants are mostly affected by Calcium deficiency. This problem is most visible in plants as black spots and brown spots on their leaves. According to the U.S. Department of Agriculture, the plant’s growth is stunted with eggshells once applied as eggshell tea or steeping shells.

You can’t deny the importance of eggs. They are delicious to eat and nutritious for health. Even after its death, you can use the eggshells as fertilizer. For plants, the eggshells can be used as a good source of Calcium. After grinding them and turning them to powder, you can use them in your garden. We shall answer your three ways to use Eggshells for your garden! Read below to know more about the following questions. 

  • How to Use Crushed or Powdered Eggshells?
  • How to use eggshell tea?
  • How to use Eggshells as seed starters/pot?

How to Use Eggshell as Fertilizer

How to Use Crushed or Powdered Eggshells?

Step: 1 

We love eating eggs in a meal. You’ll find thousands of recipes on YouTube. Eggs are traditional! After eating them or using them for a recipe, save the shells. Take a bucket of warm water and rinse the shells entirely. Then, keep them to dry overnight. Using a sunny pot will be a significant idea. You can use fingers inside the eggs to remove existing residues. If the eggshells are kept with the membrane, you’ll benefit from most of the nutrients in this. You can use 20 eggs for five plants together to fertilize. 

Step: 2

After keeping the shells overnight and getting them entirely dry, please try to crush the eggshells. It is a fine idea to convert the eggshells into a fine powder. You can grind them if required. The best idea to grind the eggshells into a powder is to use a mortar. The eggshell’s powder can be used in your soil! It will be fertile in the soil and provide maximum Calcium to the plant’s roots. 

Step: 3

After turning the eggshells into a fine powder, keep the powdered eggshell in a pot. Add a few teaspoons of the powder into the soil if planting new plants such as new flowers, herb orb vegetables. If the powdered eggshells are mixed directly into the hole as a potting mix, it will ensure enough nutrients for the plants. You can add crushed eggshells by the base of the plants besides using them as fertilizer. By that time, the eggshells will be leaching Calcium and other essential nutrients into the soil. Why not get your plants as healthy plants?

Step: 4

Crushed or Powdered eggshells can be used in potting soil. I bought plants from the nursery; it is necessary to replant them into a new pot. Before you do replanting, you should try mixing a handful of powdered eggshells into the soil. Through the process, the eggshells will get nutrients into the soil. Indeed, it is a lengthy process to grow your plants strong and healthy. You can add the crushed eggshells into your compost bin. It will be helpful too!

How to use eggshell tea?

  • Following the same rule to grind some raw eggs, the next step is to rinse the eggshells with warm water. Wash them properly inside and outside with fingers to see no residues on the egg’s surface. After rinsing the eggshells entirely, could you leave them in a sunny spot to dry? Don’t detach the membrane from the shells. It has more nutrients! 
  • After getting the eggshells entirely dry, crush them loosely using your hands. I have used a coffee grinder to do this! You can try such a food processor to crush the shells. After grinding the eggshells and turning them to powder, place them in a large pot. 
  • As per our experience, two tablespoons or 30 grams of powdered eggshells can make 3 liters of eggshell tea. During the preparation of eggshell tea making, it is wise to add 1 tablespoon of Epsom salt. It will add extra nutrition, such as magnesium and sulfate, to the tea. It will be a beneficial opportunity for your plants. 
  • It will be a better idea to let the eggshells in warm water for a night. If lengthy, we have another recommendation for you. Apply it! Fill a pot with boiled water. If you are using 30 grams of powdered eggshells, take 3 liters of water. Then, start boiling the water again to jump-start the powder and nutrients into the water faster. 
  • Please take out the pot from heat and keep them covered for at least 24 hours. During this time, the powdered eggshells will release more nutrients into the water. 
  • What’s next? After 24 hours, strain the water into a bowl. Check the outdoor temperature. Don’t use the eggshell tea by being too hot or too cold. Keep the water at medium temperature. It helps the soil system and plants to absorb the nutrients better. 
  • You can use the diluted eggshell tea by watering your plants. Try spraying the eggshell tea once a month. This will be a great source of Calcium, magnesium, and sulfate. Why not give your plants a growing boost? Go for it!

How to use Eggshells as seed starters/pot

How to use Eggshells as seed starters/pot?

  • Well, this is a great opportunity to talk about using Eggshells as seed starters. It will be a great experience for you if you have not gone through this mile—no more gossips. Let’s crack a raw egg and clean the yolk and white membrane from inside. Break the egg in half so that you get the eggshells in two parts, and they turn into mini pots! You can use a spoon to crack the eggs. If you want to use eggshells as seed starters, you should not use hardboiled eggs as the shells would be brittle. Besides, colored or painted eggs are not appropriate for this project. Any kinds of dyes can harm the delicate seedlings.
  • Once you collect sufficient eggshells as seed starters, start cleaning them with warm water. Especially, clean out the residue from inside with your fingers gently after rinsing the eggshells entirely, set them down in the sun. 
  • Once dried, make a drainage hole in the bottom of the eggshell. You can do it using a thumbtack or pin! If using a pin, try making the drainage hole from the inside. The drainage hole you make will prevent over-watering. It will be significant to save a young plant!
  • Once the drainage hole is made, fill the eggshell with seed starting soil. Try adding damp inside the shell. Sometimes, it is risky to replenish the soil into the eggshell using your hands. Make a cone-rolling up a piece of paper and use it for the soil purpose. Then, sprinkle two seeds on top of the soil and cover them with more soil. We recommend flowers, herbs, vegetables, and squash to start in eggshells. 
  • Try using an egg holder to place the eggshells. Then, keeping the egg holder on a sunny windowsill would be a good idea. Using an egg holder is a good idea so that the draining water doesn’t get soggy.  
  • After keeping the eggshells in the egg holder, water the seeds, the seeding can be seen in a week. We recommend using a spray bottle to maintain watering a lot more. Delicate the young plants!
  • When the seedlings are set of real leaves, try transplanting them outside. You can use powdered eggshells in the soil to provide your plants more Calcium and more nutrients. As the eggshells are biodegradable, they will release nutrients and helps the young plant grow. We are almost done! 


In this guide, we have tried explaining the following topic, ‘How to use eggshell as fertilizer?’ You’ll get no real components in the garden than eggshells. They have usefulness as fertilizer. Besides, the eggshells have an organic pest control opportunity. Let us know your experience of using eggshells in the garden as fertilizer. Read us!