7 Easy Homemade Fertilizers For Indoor Plants Growing In Water

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Are your indoor plants in need of a nutrient boost? Homemade fertilizers for indoor plants growing in water will help your plants to get the natural ingredients that will nourish and revitalize them.

If you want your water-growing plants to have all the necessary nutrients to grow, you should fertilize them.

Water-grown indoor plants are prone to nutrient deficiencies since they rely solely on water for their nourishment.

Fertilizing these plants has several benefits, including providing the essential nutrients needed for healthy growth and preventing nutrient deficiencies.

How To Apply Homemade Fertilizer For Indoor Plants In Water

To apply fertilizers to your water-grown indoor plants, simply dilute a small amount of the homemade mixture in the freshwater when changing the old water in the jar.

This will ensure that the plants receive the necessary nutrients for optimal growth.

How Often Should You Fertilize Water-Growing Plants

Once visible roots have formed, you can start feeding water-growing indoor plants with a water-soluble fertilizer every 2 weeks.

Using homemade fertilizers in water-grown indoor plants allows you to control the nutrient balance, ensuring that your plants receive the necessary nutrients for healthy growth.

Homemade Fertilizers For Indoor Plants In Water

1. Banana Peels

Banana peels used as homemade fertilizer for indoor plants growing in water

To be used as a homemade fertilizer for indoor plants growing in water, banana peels can be dried, ground into a fine powder, and added to your plant’s water.

Banana peels are a great source of potassium. This makes them an excellent natural source of fertilizer.

To dry banana peels, chop them into small pieces and allow them to air dry for about a week.

Once dried, grind them into a fine powder using a blender or mortar and pestle.

Add half a teaspoon of the powder once every 2-3 weeks.

2. Eggshells

Crushed eggshells used as homemade fertilizer for indoor plants in water

Eggshells are a great source of calcium, which is essential for plant growth.

To use eggshells as a fertilizer, wash and air dry them for a few days.

Crush them into a fine powder and add half a teaspoon of eggshell powder into your plant’s water jar once a month. This will provide them with the calcium needed.

3. Epsom Salt

Magnesium sulfate or epsom salt bottle in a chemistry laboratory

If you want your plants to have healthier and fuller leaves, add a pinch of Epsom salt to your water plant jar every 3-4 weeks.

Epsom salt, also known as magnesium sulfate, is a crucial nutrient for plants.

It plays a vital role in photosynthesis and the production of chlorophyll, which helps keep your plants green.

Epsom salt is a readily available source of magnesium and sulfur, which are essential for plant growth. The sulfur in Epsom salt aids in the formation of proteins and enzymes, promoting healthy plant development.

4. Aquarium Water

Aquarium on  top of table in a room

Aquarium water contains a wealth of essential nutrients such as nitrogen, phosphorous, and potassium from fish waste.

It is rich in beneficial bacteria which can enhance the overall well-being of the plants.

Add 30 ml of aquarium water to your plant’s fresh water whenever you change it.

5. Cooking Water

Boiling vegetables on stove

When you boil or steam your vegetables, don’t forget to save the nutrient-rich cooking water for your houseplants!

Set the water aside to cool off and then add it to your indoor plant’s water jar to supply them with essential nutrients from the vegetables.

6. Rice Water

Woman pouring water in a bowl of rice

Rice water contains minerals like nitrogen, potassium, and phosphorus that are vital for strong root development and overall plant health.

To use it as a homemade fertilizer, soak one cup of rice in 300 ml of cold water for 3 days. Pour 50 ml of soaked rice water into your plant’s water jar once a week.

7. Tea


Don’t throw away used tea bags. Use them to fertilize your indoor plants.

Take 2-3 used tea bags and steep them in 250 ml of water overnight.

In the morning, dilute the tea with equal amount of freshwater. Add 30 ml of the mixture into your plant’s water jar.

Repeat 2 weeks later.

Make plant fertilizer with everyday items


How Often Should I Change the Water and Add Fresh Fertilizer for Water-Grown Indoor Plants?

To prevent algae growth in water-grown indoor plants, change the water and add homemade fertilizer every 2-4 weeks. Ensure adequate sunlight and troubleshoot common issues for healthy plants.

Can I Use Homemade Fertilizers for Water-Grown Indoor Plants if I Don’t Have Access to Commercial Fertilizers?

Yes, you can use homemade fertilizers for water-grown indoor plants if you don’t have access to commercial fertilizers. Homemade fertilizer recipes offer alternatives to commercial ones with the best ingredients and benefits for your plants.

What Are the Potential Risks of Over-Fertilizing Water-Grown Indoor Plants?

Over-fertilizing water-grown indoor plants can lead to risks such as nutrient burn, root damage, and stunted growth. It’s important to follow recommended dosage guidelines and regularly monitor plant health to avoid these issues.

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