Health Interest, Urban Farming

How to Make Your Own Natural Fertilizers for Growing Microgreens and Other Plants

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Growing microgreens and other plants at home is an excellent way to enhance your culinary experience and enjoy fresh, nutrient-rich produce. While healthy soil is vital for plant growth, using natural fertilizers can further boost their development and yield. In this article, we will explore various techniques and recipes for making your own natural fertilizers specifically tailored to growing microgreens and other plants. By harnessing the power of organic materials, you can ensure a sustainable and eco-friendly approach to gardening.

Understanding the Importance of Natural Fertilizers

Natural fertilizers offer several advantages over synthetic alternatives. They improve soil structure, increase nutrient content, enhance microbial activity, and promote sustainable gardening practices. By using organic materials readily available in your household or local surroundings, you can create fertilizers that are free from harmful chemicals, cost-effective, and environmentally friendly.

Composting: The Foundation of Natural Fertilizers

Composting is an essential process that transforms organic waste into nutrient-rich humus. This dark, crumbly substance serves as the building block for natural fertilizers. Start by collecting kitchen scraps, such as fruit and vegetable peels, coffee grounds, eggshells, and tea leaves, and add them to a compost bin or pile. Remember to balance the “greens” (nitrogen-rich materials) and “browns” (carbon-rich materials) to create an optimal environment for decomposition. Turn the pile regularly to encourage aeration and decomposition, and within a few months, you’ll have a rich compost to use as a base for your natural fertilizers.

Vermicomposting: Harnessing the Power of Worms

Vermicomposting is a specialized form of composting that utilizes worms to break down organic matter. Red wiggler worms (Eisenia fetida) are commonly used for vermicomposting due to their voracious appetite and ability to quickly convert organic waste into nutrient-rich castings. To start vermicomposting, create a worm bin by layering bedding materials such as shredded newspaper or coconut coir and adding the worms. Feed them with kitchen scraps, avoiding oily or excessively acidic foods. The worms will transform the organic matter into nutrient-dense worm castings, which can be used as a potent natural fertilizer for microgreens and other plants.

Homemade Liquid Fertilizers

In addition to compost and worm castings, liquid fertilizers provide a quick and easily absorbable source of nutrients for plants. Here are some simple recipes for homemade liquid fertilizers:

a. Compost Tea: Soak a few shovelfuls of compost in a bucket of water for several days, stirring occasionally. Strain the mixture and dilute it with water at a ratio of 1:10 before applying it to plants.

b. Banana Peel Fertilizer: Chop up several banana peels and soak them in a jar of water for a week. Strain the liquid and dilute it with water at a ratio of 1:5. This potassium-rich fertilizer is excellent for promoting flowering and fruiting.

c. Epsom Salt Solution: Dissolve one tablespoon of Epsom salt (magnesium sulfate) in a gallon of water. This solution provides magnesium, which aids in chlorophyll production and overall plant health.

d. Nettle Fertilizer: Fill a container with nettle leaves and cover them with water. Allow it to steep for a week, then strain the liquid. Dilute it with water at a ratio of 1:10 and use it to fortify plant growth.11

Incorporating Organic Amendments

Aside from compost and liquid fertilizers, organic amendments can further enrich your soil and promote plant growth. Some popular options include:

a. Bone Meal: Derived from ground animal bones, bone meal is an excellent source of phosphorus and calcium. It promotes root development and strengthens plant structure. Incorporate it into the soil before planting or use it as a top dressing during the growing season.

b. Fish Emulsion: Fish emulsion is made from fermented fish waste and is rich in nitrogen, phosphorus, and micronutrients. It provides a quick boost of nutrients to plants and improves overall growth. Dilute fish emulsion with water according to the manufacturer’s instructions and apply it to plants as a foliar spray or soil drench.

c. Seaweed Extract: Seaweed is a natural source of trace minerals, growth hormones, and beneficial enzymes. Seaweed extracts can stimulate root development, enhance nutrient uptake, and increase plant resistance to stress. Dilute seaweed extract according to the product instructions and apply it to plants every few weeks.

d. Wood Ash: Wood ash from hardwood fires is a good source of potassium, calcium, and trace elements. It helps neutralize acidic soil and provides nutrients that promote flowering and fruiting. Sprinkle wood ash sparingly around plants and work it into the soil.

Green Manure Cover Crops

Green manure cover crops are fast-growing plants that are sown to improve soil fertility and structure. These crops, such as clover, buckwheat, or alfalfa, are planted between growing seasons or in unused garden beds. When the cover crop reaches maturity, it is tilled back into the soil, adding organic matter and nutrients. This practice improves soil structure, suppresses weeds, and increases soil fertility for future plantings.

Mulching for Nutrient Retention

Mulching is a technique that involves covering the soil surface around plants with organic materials. This layer helps retain moisture, suppress weeds, and provide slow-release nutrients as it breaks down. Use materials like straw, wood chips, or dried leaves as mulch. As the mulch decomposes, it enriches the soil and creates a favorable environment for beneficial soil organisms.

Balanced Nutrition for Microgreens

Microgreens have unique nutritional requirements due to their rapid growth and short harvesting time.  In fact, at Natural Yield, for the vast majority of our microgreens we do not use any nutrient.  Plants generally do not need nutrient through this stage of growth.  However, if you were to use nutrient with microgreens it is important to provide them with balanced nutrition, so consider using a specifically formulated organic microgreen fertilizer. These products typically contain a blend of nutrients, including nitrogen, phosphorus, potassium, and micronutrients, in ratios optimized for microgreen growth. Follow the manufacturer’s instructions for application rates and frequency.

Dos and Don’ts of Natural Fertilizers

While natural fertilizers are beneficial for plant growth, it is essential to follow some guidelines to ensure optimal results:

a. Do perform soil tests: Regular soil testing helps identify nutrient deficiencies or imbalances. Adjust your fertilization approach based on the results to provide the necessary nutrients for healthy plant growth.

b. Don’t overapply fertilizers: Excessive fertilizer application can lead to nutrient runoff, environmental pollution, or plant damage. Always follow recommended application rates and avoid applying fertilizers during periods of heavy rainfall.

c. Do maintain a balance: Different plants have different nutrient requirements. Research the specific needs of the plants you are growing and adjust your fertilization approach accordingly. A balanced nutrient supply promotes healthy growth and prevents nutrient deficiencies or toxicities.

d. Don’t rely solely on fertilizers: While natural fertilizers are beneficial, they should complement other good gardening practices. Provide adequate sunlight, water, and care to ensure overall plant health.


Making your own natural fertilizers for growing microgreens and other plants not only promotes sustainable gardening but also