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Top 12 Natural Ways to Fertilize Indoor Plants

Top 12 Natural Ways to Fertilize Indoor Plants

Indoor plants add beauty to our living spaces and offer a range of health benefits, from improving air quality to reducing stress. The proper nutrients are crucial to keep them healthy and flourishing. While synthetic fertilizers are readily available, natural alternatives are more eco-friendly, budget-friendly, and gentle on indoor plants.

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This blog will explore 12 simple and effective indoor natural fertilizers to help your plants thrive. We'll provide detailed instructions and tips to make indoor gardening a breeze, even for beginners!

1. Compost: Nature's Black Gold

Compost is like magic for your indoor plants! It is a nutrient-rich fertilizer made from decomposed organic matter, such as kitchen scraps, yard waste, and coffee grounds. Not only does it provide essential nutrients, but it also improves soil structure, allowing better water retention and air circulation around the roots.

To create compost, collect fruit and vegetable peels, eggshells, coffee grounds, and other kitchen waste in a compost bin. Mix in dry leaves or shredded paper to maintain the proper moisture balance. Over time, the mixture will break down, turning into nutrient-rich compost that you can use to top-dress your plants or mix into the soil.

Compost is also a fantastic way to reduce waste and contribute to a healthier planet. Composting can turn kitchen and yard waste into a valuable resource for your indoor garden.

Frequency: Apply compost every two to four months, depending on the plant's needs and the condition of the soil.

2. Banana Peels: Boost with Potassium Power

Don't let banana peels go to waste! They are an excellent source of potassium, an essential nutrient for overall plant health and flower/fruit production. Potassium helps plants use water efficiently and supports photosynthesis, making it vital for indoor gardens.

To use banana peels as a natural fertilizer, cut them into small pieces and bury them an inch below the soil surface. As the peels decompose, they release potassium and other nutrients slowly, providing a steady supply to your plants. This natural slow-release mechanism prevents nutrient imbalances and ensures your plants get what they need when they need it.

Banana peels are an excellent natural fertilizer and a budget-friendly solution for plant care. So, instead of throwing them away, use them to boost your indoor plants' nutrients.

Frequency: Apply banana peels once every two to three months for best results.

3. Epsom Salt: Magnificent Magnesium

Epsom salt, also known as magnesium sulfate, is a superhero for your indoor plants. Magnesium is vital for photosynthesis and chlorophyll production, the green pigment in plants. Plants with enough magnesium can make more food through photosynthesis. And they will stay green and healthy.

Using Epsom salt is simple. Dissolve one tablespoon of Epsom salt in a gallon of water and water your plants with this solution once a month. It's important not to overdo it, as a little goes a long way.

Frequency: Apply Epsom salt once a month during the growing season, but avoid overdoing it to prevent magnesium buildup.

4. Eggshell Elixir: Boosting Calcium


Save those eggshells! They are a free and natural source of calcium for your indoor plants. Calcium is essential for building strong cell walls and supporting healthy growth.

To use eggshells as a natural fertilizer, wash and dry them, then crush them into small pieces. Sprinkle the crushed shells around the base of your indoor plants to provide them with a slow-release calcium boost.

Eggshells are a practical and eco-friendly way to supply your plants with calcium; don’t waste them! Check here four surprising uses of eggshells for plants.

Frequency: Apply crushed eggshells every two to three months to maintain adequate calcium levels in the soil.

5. Aloe Vera Juice: Growth Booster


Aloe vera is not just for soothing sunburns; it can also be a growth booster for indoor plants. The gel inside aloe vera leaves is packed with nutrients, amino acids, and enzymes that promote root development and overall plant growth.


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To use aloe vera juice, mix two tablespoons of the gel with water and water your plants once a month. This will help your plants absorb water and nutrients better, leading to healthier and more vigorous growth. Aloe vera also has natural antimicrobial properties that protect plants from certain pests and diseases.


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Frequency: To support optimal growth, apply aloe vera juice once a month, especially during the growing season.

6. Green Tea Infusion: Antioxidant Treat


Green tea is a treat for us; and your plants will love it too! It provides a gentle source of nitrogen, a must-have nutrient for leafy growth.

After making a cup of green tea, let the used tea bag or leaves cool down. Then, remove the tea bag or strain the leaves, and use the cooled tea water to water your plants. This infusion will provide a subtle nitrogen boost and add valuable antioxidants to the soil. Additionally, green tea may help inhibit the growth of certain fungi, reducing the risk of plant diseases.

Green tea is a delightful and natural way to nourish your indoor plants. Give your plants a nutrient-rich treat, and stop tossing those used tea bags.

Frequency: Apply green tea infusion every two to three weeks to maintain steady nutrient levels in the soil.

7. Vegetable Broth: Yummy Plant Food


When you cook vegetables, please don't throw away the leftover water; use it as a nourishing liquid fertilizer for indoor plants. The water used to cook vegetables contains essential vitamins and minerals, making it an excellent natural source of nutrients for your plants.

After the vegetable broth cools down, water your plants with it. This will enrich the soil and encourage healthy growth. The nutrients in the broth vary based on the vegetables used, giving your plants a diverse range of beneficial elements. Just be cautious about the salt content, as excessive salt can harm plants. If you're worried about salt levels, dilute the broth with water before using it.

Remember: Recycling vegetable broth is a practical and eco-friendly way to boost indoor plants' nutrients!

Frequency: Use vegetable broth once a month during the growing season, but ensure it is free from too much salt.

8. Fish Emulsion: All-Purpose Marvel


Fish emulsion is a liquid fertilizer from fish byproducts like fish oil and fish meal. It is rich in nitrogen, phosphorus, and trace minerals, making it an excellent all-purpose organic fertilizer. The high nitrogen content promotes leafy growth, while phosphorus supports root development and flowering.

To use fish emulsion, dilute it according to the manufacturer's instructions and water your plants with it every two to four weeks during the growing season. This natural fertilizer will give your indoor plants a steady supply of nutrients, keeping them healthy and vibrant.

Fish emulsion is a fantastic choice for plant care, especially for those who prefer organic options. It's a great way to give indoor plants the nutrients they need to thrive.

Frequency: Apply fish emulsion every two to four weeks during the growing season for optimal results.

9. Seaweed Extract: Nutrient Boost and More


Seaweed extract is a fantastic natural supplement for your indoor plants. Like plant medicine, seaweed extract contains potassium, calcium, magnesium, and trace elements. It also contains natural plant growth hormones that stimulate root development and enhance plant health.

To use seaweed extract, dilute it in water according to the product's instructions and apply it to your indoor plants every two to four weeks. It can be applied directly to the soil or as a foliar spray. Seaweed extract is gentle on plants and helps them tolerate stress better, making it an excellent choice for plant care.

Frequency: Apply seaweed extract every two to four weeks for healthy and robust plants during the growing season.

10. Rice Water: Simple and Nourishing


Rice water might be humble, but it's packed with nutrients like vitamins and minerals that your plants will appreciate.

To use rice water as a natural fertilizer, let the water used to rinse or cook rice cool down, then water your plants with it. The soil can absorb the nutrients in rice water, providing essential elements for plant growth. This method is particularly beneficial for rice water cooked with little or no salt, as excess salt can harm plants.

Rice water is a simple and budget-friendly way to fertilize your indoor plants. Please don’t waste it and give your plants a nutrient boost.

Frequency: Use rice water once a month to supplement your indoor plants with natural nutrients without straining your budget.

11. Wood Ash: Potash Power


Wood ash is the powdery stuff left after burning wood. It's full of potash, a form of potassium that your plants will love. Sprinkle a thin layer of wood ash around your plant's base but be careful not to overdo it.

Frequency: Apply wood ash every two to three months and watch your plants thrive.

12. Molasses: Microbial Magic


Yes, molasses! It might sound surprising, but it's a fabulous natural fertilizer that helps soil microbes do their job.

To make it, mix one tablespoon of unsulphured molasses with a gallon of water, and water your plants with this magical solution.

Frequency: Apply the molasses solution once a month during the growing season.

The Bottom Line

Now you have plenty of natural and easy ways to nourish your indoor plants. By incorporating these eco-friendly and budget-friendly options into your plant care routine, you'll create a vibrant indoor garden that brings joy and beauty to your living space year-round.

Remember to observe your plants closely and adjust your fertilizing routine based on their needs. Each plant is unique and may require different amounts of nutrients. With love, care, and these natural fertilizers, you can become a gardening expert and enjoy the rewards of a flourishing indoor garden.

Do you want to take your plant care skills to the next level? Be sure to check out our page.

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