4 Natural Ways To Fertilize Houseplants

As someone so infatuated with living a life surrounded by plants, one would think my thumb would be a littttttle bit greener.

The truth is: I’m still learning how to keep these beauties thriving, and I can use all the help I can get.

Luckily, there are tons of simple, natural ways to keep houseplants healthy. Here are a few I’ve found out about – and if you have any ideas to add, leave a comment!

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Eggshells. Eggshells are filled with calcium, which is essential for plants to develop a strong cellular structure. You can make a fertilizer tea by crushing up a bunch of eggshells, adding them to boiling water, and allowing to steep overnight. In the morning, pour the tea right onto the soil to give your babies some love. Another way you can use eggshells is to create a powder by placing a bunch of clean and dry eggshells into your food processor. The powder can be mixed into the soil right before potting a new plant.

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Coffee. Many gardeners add coffee grounds to their compost piles to help nourish plants and kill weeds and pathogens – but you can used brewed coffee on plants, too! Brewed coffee contains a good amount of potassium and magnesium, which are excellent for plant growth. Use equal parts cooled plain coffee and water, and water your plants as you normally would. Because of the acidic nature of coffee, this technique should be reserved for plants that do well in acidic conditions, like ferns, roses, and aloe.

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Green tea. The tannic acid in green tea will slightly raise the acidity of soil, just like coffee. Green tea also increases nutrient levels in soil and improves oxygenation, which helps roots thrive. You can add tea leaves right into your soil or water your plants with brewed tea after it has cooled. Again, be sure to use this on plants that thrive in more acidic conditions.

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Epsom salt. High quality Epsom salt is rich in magnesium and sulfate, two minerals that together provide incredible nourishment for plants, allowing them to grow fuller and greener, and live longer lives. You can water plants twice a month with 1 tablespoon of high quality Epsom salt dissolved in 1 gallon of water, or mist their leaves with a mixture twice as concentrated. You can also add Epsom salt granules directly to soil when repotting.

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+ How do you keep your houseplants thriving? Do share!

Follow Brigette on Instagram, and have a look at her blog Hummusbird!


  1. This is amazing! I never thought of using eggshells–what a perfect way to better the environment without wasting any food!

  2. Yes! Thank you for this post. I’m definitely going to try out the eggshell fertilizer “tea.” Right now I have about 10 houseplants in my room alone that I only care for with sunshine, water and love. I’m sure they’ll delight in getting some more nutrients.

    Dee | http://www.daundra.com/blog

  3. Wow! I can totally do the coffee grounds and epson salt idea. Thank you so much for sharing this. I am trying to expand my green thumb. We eat a lot of salsa, so I bought some cilantro for my windo sill and I know I will have to transplant soon because soil only has a certain length of time for nourishment in its original containers. I found your post on BlogLovin, I’d love if you stopped by and said hello some time.

  4. Amazing. My plants love eggshells and coffee but I had no idea about the epsom salt. I always have that around the house, so that will be a good edition to my gardening regime. I’d love to see a blog post about natural ways to keep pests away from plants.

  5. egg shells who would have though have so much calcium. I put egg shells in my fruit smoothies each week day .. . try adding aluminum foil to your plants and your cats whisker

  6. Amanda- im sure it could be a diy project, just take a normal clear or transparent-ish shower curtain and a large piece of lace or a lace table cloth, then loop the shower curtain rings through both the plastic curtain and the lace. done! :D

  7. Pickle juice can also do great things for a plant! My gardenia especially LOVES pickle juice. It helps make the soil acidic – so plants that don’t like coffee probably won’t like pickle juice either. Once, I applied coffee grounds, pickle juice, and a magnesium supplement cap broken open to my gardenia – and two days later, it had three gorgeous blooms! Thanks for all of the other ideas here, I’d never heard of the eggshell one :)

  8. Using coffee grounds on houseplants, i find not being a great idea personally. The times i have tried, it turns fungal and kills the plant. I dont know if it i used to much or if it is the fungus though. Herbal teawater and rice water looks to have done wonders till now.

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