– Macronutrients are the essential elements that every plant needs in large amounts for living. These macronutrient elements are Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), Sulfur (S), and Iron (Fe). A plant needs macronutrients to grow well. The macronutrients have three primary elements that every plant needs the most. The primary macronutrients that we will discuss in this article are Nitrogen (N), Phosphorus (P), and Potassium (K). Maybe, you ever heard about N-P-K elements in fertilizer. These three elements are important for plants, thus the best fertilizer should contain N-P-K in certain amounts based on the plant need. You should know more about N-P-K elements in fertilizer and how to find an organic material for them. Therefore, in this article, we will discuss N-P-K Fertilizer as Primary Macronutrients for Your Healthy Houseplants. Let’s discuss!

Primary Macronutrients for Plant

The first topic we discuss in this article is the various primary macronutrients that you can use to fertilize your houseplant. By using these N-P-K elements, you can make the houseplants you have grow better and healthier. You can use it for various types of plants such as ornamental plants to vegetables. Therefore, here are some primary macronutrients that you need to know!

  • Nitrogen (N)

Nitrogen is essential to boost energy for plants metabolism. It produces protein synthesis and nucleic acids. An expert gardener will use Nitrogen elements to develop their plants and stimulate their growth. It helps the plants to absorb nitrate from Nitrogen elements. Nitrogen elements also help your plant to involve in the formation of chlorophyll. If your plants get lack Nitrogen, they will grow slowly and their leaves turn yellow. You should measure the Nitrogen need for your plant. Don’t over-fertilizing with Nitrogen because it can decrease the immunity of your plant, make them grow too fast, and delay the blooming process.

  • Phosphorus (P)

Phosphorus is another primary macronutrient for plants. This element makes your plant grows healthy. It mends the roots system and blooming problems. Phosphorus has a crucial role to deliver and store energy for plants. These elements focus on blooming flowers, roots grow, and help the photosynthesis process. Your plant’s leaves will turn reddish-brown, bluish brown, and bent up if they lack Phosphorus. When they are over-fertilizing by Phosphorus, it damages the development process to become slow down. Their leaves turn yellow as they less produce chlorophyll.

  • Potassium (K)

Potassium is easy to find in avocados, oranges, guavas, and other fruits. Plants also need potassium to grow healthy. They need potassium to strengthen their tissue, absorb nitrates, stimulate the absorption of carbohydrates, and enzymes. Potassium gives energy for your plants to stand in cold weather, fight against fungus, and prevent withering. When your plants lack potassium, they will show dark spots on leaves. Curl and wrinkle leaves are also an indicator of lack of potassium. Your plant is easy to get sick because they reduce strength, show dull leaves, and bluish brown spots.

Things That Can Substitute The Primary Macronutrients

The next topic that we discuss in this article is a variety of things that can substitute the primary micronutrients that you use to fertilize your houseplant. If you want to know more about N-P-K fertilizer, we have some recommendations for a fertilizer that will help you increase N-P-K in the soil. Here are some things that can substitute N-P-K fertilizer with organic materials around you.

  • Manures


Manure is an animal wasted. It is an organic source of Nitrogen. Usually, you can get manure from chickens, cows, and goats. These diaries animals are easy to find in the barn. Moreover, if you have some chicken in your barn, you can store their manure in the corner of the barn. Make a pile of chicken manure to fermentate the organic substance. It is an organic material to feed your plants. The age of chicken manure and how you store it determines a good quality of fertilizer. It is better to use manure that you have stored for more than a week.

  • Ground-up Animals

Ground-up animals

The ground-up animals are blood meal, feather dust, leather dust. These are organic sources of Nitrogen. You can get these organic materials in a gardening store. It is easy to use this fertilizer. Ground-up animals have a high concentration of Nitrogen for plants. Thus, you can add ground-up animals to your fertilizer mixture.

  • Pulverized Rock Phosphate

Pulverized Rock Phosphate

Rock phosphate is a beneficial material with phosphorus-rich. It is made of rock phosphate that will convert into phosphorus for plants. It helps your plant to mend its root systems. When your plant has a darker blue color on the edge leaves, maybe it is a symptom that your plant is lacking phosphorus.

  • Compost


Compost is an organic fertilizer for plants. It contains many organic sources, thus, compost is a good recommendation for fertilizing the plants. You can add compost in your garden and increase phosphorus in the soil. This material makes a healthy garden and your plants will produce more flowers or fruits.

  • Wood Ash

Wood Ash

This organic material is easy to make at home. You need to burn some wooden planks and let them burn completely. Use a fireplace to burn the wooden planks while you enjoy the time and get warmth. Wood ash is useful to increase potassium in the soil. Some plants need more potassium to ripe the fruits. You will find wood ash in an organic mixture for soil. Wood ash is good for garlic, lettuces, chives, leeks, and so on.

  • Kaolin Clay

Kaolin Clay

Kaolinite or clay is an essential element to add potassium as an organic source. This element is useful to control pests and diseases. Kaolin clay is also beneficial to protect plants from sunburn. Thus, your plants can produce more fruits and flowers. Kaolin clay will cover every leaf and repel bad insects such as beetles, mites, thrips, and others.


Thus our discussion of N-P-K Fertilizer as Primary Macronutrients for Your Healthy Houseplants. N-P-K is essential elements that plant needs in living. These three elements have an important role to stimulate plant growth. Some gardeners need N-P-K elements in their fertilizer to develop plants properly, due to the massive growing, blooming, and fruiting more. Hopefully, this article helps you to apply fertilizer with a balanced ratio that contains N-P-K. Happy gardening!


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