Natural Fertilizer for Indoor Plants: 10 Creative and Sustainable Ideas

If you're looking for a more sustainable way to fertilize your indoor plants, you're in luck. Composting tea can be made by steeping compost in water, which is rich in beneficial microbes that help plants thrive.

Coffee grounds are a great natural fertilizer for indoor plants, as they're rich in nitrogen, phosphorus, and potassium. They can be used to create a nutrient-rich soil amendment.

Eggshells can be crushed and added to potting soil to provide calcium and other minerals to your plants. This is especially beneficial for plants like tomatoes and peppers that require a lot of calcium.

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Making your own natural fertilizers at home is a great way to give your indoor plants the nutrients they need without breaking the bank or harming the environment. You can make a variety of DIY fertilizers using common household items.

Banana peels are a great source of potassium, nitrogen, phosphorus, and magnesium, making them a perfect slow-release organic fertilizer. Cut banana peels into small pieces and mix them into the top layers of soil for a nutrient boost.

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Eggshells, coffee grounds, and banana peels all contain houseplant-boosting micronutrients and make great natural fertilizers for your houseplants. You can combine these ingredients to make a powerful fertilizer by mixing used coffee grounds, Epsom salt, chopped banana peel, and crushed eggshell with water.

Rice water is another great natural fertilizer that can even take the place of NPK fertilizers. If you wash your rice before cooking, save the water and let it cool before watering your plants.

Here are 5 DIY fertilizers you can make at home:

Banana peels are a great source of potassium as well as nitrogen, phosphorus, and magnesium, making them a valuable addition to your indoor plant fertilizer.

You can use banana peels as a slow-release fertilizer by cutting them into small pieces and mixing them into the top layers of soil, or by blending them in water and pouring the mixture on the soil.

Don't leave banana peels uncovered or on top of the soil, as they may smell or attract fruit flies.

Eggshells, coffee grounds, and banana peels all contain houseplant-boosting micronutrients and make great natural fertilizers for your houseplants.

Here's a breakdown of the benefits of each:

Potato water is another great resource for indoor plants, as it provides starch and other nutrients that flowers and veggies love.

To make potato water, simply boil some potatoes (be sure to not use water that has been salted) and save the water to use as a fertilizer the next day.

Coffee grounds are a great natural fertilizer for indoor plants. They're rich in nitrogen and add organic matter to the soil, helping it retain water and aerate.

Fresh coffee grounds can be too acidic for most houseplants, so it's best to use used coffee grounds instead. This is because they're less likely to cause harm and can provide a gentle boost to your plants.

To repurpose used coffee grounds, add them to your compost pile along with other natural waste like vegetable peels and fruit skins. When your compost is ready, mix a small amount with potting soil and distribute it among your plants.

A little compost goes a long way, so be mindful of how much you use. Excessive amounts can lead to foliage burn and nutrient toxicity. Just like with store-bought fertilizer, a little compost is all you need.

If you don't compost at home, you can create a liquid fertilizer with your used coffee grounds. Simply steep a teaspoon of coffee grounds in a gallon of water for a few nights, stirring occasionally, then strain the liquid through a cheesecloth.

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Eggshells are a great source of calcium for your indoor plants. They need calcium to extend plant walls so they can grow.

You can collect eggshells from your kitchen and grind them into a fine powder using a coffee grinder, blender, or mortar and pestle. This will make it easier for your plants to absorb the calcium.

Human hair is another surprising source of nitrogen for your plants. You can collect hair after a haircut or remove it from a hairbrush. Cut up the hair before mixing it into potting soil for optimal results.

Here's a quick rundown of what you can do with these natural fertilizers:

Eggshells are a great natural fertilizer for your houseplants, and they're loaded with calcium, which helps build healthy cells in the plant and balances overly acidic soil.

To make eggshell grounds, start by collecting eggshells and rinsing them with water to remove any bacteria. You can also sanitize them in the oven at 350º or boil them for 5 minutes to kill any remaining bacteria.

Dry and lightly crush the eggshells using a wooden utensil, mortar & pestle bowl, or blender. This will help release the calcium into the soil.

Here's a simple recipe to make eggshell grounds:

Remember, nutrients come in small amounts in eggshells, so rinsing and collecting them in a bowl to dry throughout the month will allow you to make the most effective eggshell water.

Human hair can be a valuable addition to your potting soil, providing a natural source of nitrogen for your plants. Hair is a great source of nitrogen, making it a beneficial fertilizer.

Cut up the hair into smaller pieces before mixing it into your soil, as this will help it break down faster. Hair can take a long time to release its nutrients, so it's best to use it in combination with other fertilizers.

Urine makes a great fertilizer for houseplants because it contains lots of nitrogen, some phosphorus, and potassium. Mix 20 parts water with the freshest urine possible to create a solution for your plants.

Epsom salt is another natural fertilizer that can help your plants grow greener and bushier. It contains magnesium and sulfate, which encourage healthy growth.

Human urine makes a great fertilizer for houseplants because it contains lots of nitrogen and some phosphorus and potassium. It's a natural and free resource that can be used to revitalize soils.

To use urine as a fertilizer, use the freshest urine possible and dilute it with 20 parts water. This will make it safe to use on your plants without burning their roots.

Urine takes the place of expensive fertilizers, allowing you to save money and help the planet at the same time. It's a win-win situation for both you and the environment.

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Epsom Salts are a great natural fertilizer for your houseplants. They contain magnesium and sulfate, which encourage healthy growth.

You can mix 1 to 2 tablespoons of Epsom salt into 1 gallon of water to use as a fertilizer. Simply water your plants with this solution once every two weeks during the growing seasons.

Epsom salts can also be used as a foliar spray. Mix a more concentrated solution of 2 tablespoons of Epsom salt into 1 gallon of water and mist the leaves of your plants with it.

Adding a handful of Epsom salt granules to the soil when you're planting or repotting your houseplants can also help promote healthy growth.

Consider reading: How Much to Water House Plants

Banana peels are a great source of potassium as well as nitrogen, phosphorus, and magnesium.

Using banana peels as a fertilizer is as simple as cutting them into small pieces and mixing them into the top layers of soil. You can also blend the banana peels in water and pour the mixture on the soil.

Eggshells, coffee grounds, and banana peels all contain houseplant-boosting micronutrients and make great natural fertilizers for your houseplants.

Cut banana peels into small pieces to avoid them smelling or attracting fruit flies when left uncovered.

Banana peels can be applied to the top layers of soil or blended in water and poured on the soil for a slow-release fertilizer.

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