6 Organic Houseplant Fertilizer Recipes That Work Like Magic!

In this article, we will see how you can make your own potted plant fertilizer at home. In the confined space of a pot, the earth loses its useful ingredients faster and needs to be fertilized regularly. The market today offers an unlimited choice of potting soils, fertilizers and phytosanitary products. However, these recipes that we are going to show you are organic, zero waste, non-toxic and safe! Plus, we’ll also answer the questions of what, how much, and when to fertilize the soil for your houseplants using your own waste. So if you want to know how to make the best houseplant fertilizer, keep reading:

With these organic fertilizers you will keep your plants healthy and growing

There are some things that are good to know when starting to grow plants in containers. Make your own houseplant fertilizer for potted plants while making the most of your own resources! Here is some general information about fertilizing your plants:

  • The less light reaches the plant, the less it needs to be fertilized, and it is best to fertilize in the morning and at dusk when the temperatures are not very high.
  • You should fertilize young plants with weaker concentrates.
  • Plants need nitrogen during growth and potassium and phosphorus during flower bud development. Plants do not need fertilizing when dormant.

Knowing what your plants really need is the first step to a beautiful indoor jungle.

diy organic plant fertilizer

What substances do potted plants need?

In order to know from what we can make fertilizer for our potted plants at home, we need to know the active substances of each material that we intend to use. Whether grown in a container or in the garden, plants need basic substances such as nitrogen, calcium, potassium, phosphorus, magnesium and minerals, and the type and family of the plant itself determine which substances predominate over others. The common thread is that most container plants do not like acidic (nitrogen) soil. So with nitrogen carefully. Leafy ornamentals prefer nitrogen, sulfur and magnesium. Other common nitrogen-loving plants are roses, azaleas, and most evergreens. Flowering plants prefer a higher potassium content. Potassium helps to form more flowers. Phosphorus helps build a strong root system and is good to use when planting and when transplanting to a larger pot. The amount needed depends on the growth rate. Soil pH is easily monitored with so-called indicator strips, which you will find in any agrarian store.

Plants need nitrogen, calcium, potassium, phosphorus, magnesium and minerals

How to use houseplant fertilizer

How often should you add fertilizer to potted plants?

Along with knowing how, you also need to know how often to fertilize your favorite potted houseplants. Ready-made soil from the store contains enough nutrients for 6 weeks, then the need for nutrients in the soil increases. Plants feed during growth and flowering, not during dormancy. A basic rule for determining the need for substances is the speed of growth. The faster a plant grows, the more fertilization it needs. It is important to know that plants absorb liquid fertilizers faster than dry ones, but are also more concentrated. The optimal concentration should therefore not be more than once every two weeks between March and October. Below, we’ve rounded up a few ways and recipes to feed plants with things found in every home.

The ready-to-use soil from the store contains enough nutrients for only 6 weeks

homemade fertilizer for indoor plants

The faster your plant begins to grow, the more fertilization it will need.

banana peel plant fertilizer

Tip: make sure to fertilize your plants every time you repot or move them

organic plant fertilizer for indoor plants

How do I fertilize my potted plants?

We have collected some of the most common recipes with effective cooking ingredients and, unlike chemical fertilizers, safe for humans and the environment.

Fertilizer for houseplants based on eggshells

Eggshells contain calcium and phosphorus. Calcium is needed by plants throughout the period of growth and photosynthesis. Note that it reduces the acidity of the soil. How to use : remove the inner membrane from the shells and let them dry. The first option for use is to crush the shells and mix them into the ground or sprinkle them on the surface. When applied, the shells release their beneficial substances longer. The second option is to make liquid fertilizer from eggshells by soaking the cleaned shells in water overnight and spraying them with it.

Eggshells are rich in calcium and phosphorus, perfect for periods of growth

DIY natural indoor plant fertilizer

Fertilizer for houseplants based on coffee grounds

Coffee grounds contain nitrogen, phosphorus, potassium and minerals. Coffee grounds are actually quite strong so should be used with care. For potted flowers, fertilizing with coffee is done once every six months. Check out this guide to reusing coffee grounds for plants. Caution: it oxidizes the soil.

Coffee grounds are a rich and powerful fertilizer, so you have to be careful

natural fertilizer for indoor plants

Nettle Houseplant Fertilizer

Nettle is rich in nitrogen, potassium, magnesium and phosphorus. It has antifungal properties. How to use: Soak 1 kg of nettle in stagnant water (therefore without chlorine) for 1 to 2 weeks, stirring daily for faster fermentation. Caution: It gives off a rather unpleasant odor when decomposing. The tank in which you keep the nettles must not be made of metal to prevent the nettle from oxidizing. It should be placed in a cool, shady place. Dilute the resulting fertilizer 1/10 with water and use it on your plants.

Among other benefits, nettle also has antifungal properties

How to make homemade houseplant fertilizer

Banana Peel Houseplant Fertilizer

Banana peels contain potassium, magnesium and phosphorus. The good thing about banana peels is that they release their beneficial substances over a long period of time. If you have overripe bananas lying around, just use the fruit for a delicious overripe banana recipe. Save the banana peels for your plants! How to use: Liquid fertilizer – soak the cut peels in water for a few days and spray them with it.

Did you know that banana peels are rich in potassium, magnesium and phosphorus

what can I use as fertilizer for indoor plants

Make your own liquid fertilizer with used banana peels by soaking them in water

How to make plant fertilizer with eggshells

Epsom Salt Houseplant Fertilizer

(Yes, you read that right) Epsom salt contains the essential nutrients: nitrogen, phosphorus and potassium. It is very good for fruit bearing plants like fruit trees as it increases the level of sugar in the fruit. It drives away pests and fertilizes the soil.

Epsom is not only beneficial for your health and skin, but also for your plants

How to make houseplant fertilizer

Fertilizer for houseplants from tea bags

Tea bags (but not black tea) contain nitrogen, potassium, calcium, phosphorus and magnesium. This fertilizer oxidizes the soil, but be careful, it also attracts flies and ants. You can use tea water for watering, or scatter the dry mass in the soil of the plant. This is one of the ways to reuse tea bags for something interesting and unique!

Used tea bags contain nitrogen, potassium, calcium, phosphorus and magnesium

How to make houseplant fertilizer

Frequently Asked Questions

How do I make homemade fertilizer for my plants?
You can very easily make homemade organic fertilizer for your plants, provided you know the specific needs of each plant beforehand.

What can I make homemade plant food from?
Ingredients such as coffee grounds, eggshells, and the peelings of certain fruits and vegetables can be great fertilizer for your plants.

How often should I fertilize houseplants with homemade fertilizer?
Plants grown in containers need nutrient additions every two weeks during the active period of growth and flowering, and do not need to be fed during the dormant period.

Time to show your potted plants some love with these organic recipes

which fertilizer is best for houseplants


And in conclusion, we can say that it is not necessary to spend extra money on fertilizers from the store. Your own home provides you with enough safe and inexpensive ways to maintain the health and beauty of your houseplants. If you want to avoid using harsh chemicals in your home as well as in your garden, be sure to also check out our guide to eco-cleaning using safe, homemade cleaning solutions!

Leon E. Hill