DIY Fertilizers made from Natural Ingredients

Natural fertilizers make your plants and herbs grow healthy and strong! They give them tons of nutrients, which provides the best base for growth. You don’t have to look far for these materials either!

DIY Natural Fertilizers

Below are a variety of natural fertilizers for your organic garden.


Seaweed is awesome, and can be used in a ton of ways. Some people cook with it, eat it or heal with it. Dried or fresh, seaweed makes a great fertilizer because it has trace elements, allowing it to serve as a food source to microbes in the soil!

All you need to do it chop some seaweed up in a bucket, and add it to 5 gallons of water. Leave it for 3 weeks with a loose covering.

You can use 2 cups on a small plant, 4 on a medium and 6 on a large. You can also combine seaweed fertilizer with tea fertilizers to create even better fertilizers.

Human Urine

Urine is sterile as long as the body is healthy. Urine is higher in nitrogen, potassium and phosphorous than commercial fertilizers. You may now start questioning the times you chided your son for going “nature boy” in your garden.

The best urine to water ratio is 1:8. Pour a cup into 8 cups of water in a plastic bucket to fertilize your plants. Small gets 2, medium gets 4 and large gets 6 cups.

Manure – Chicken, Horse, Cow

You can find people giving composted manures away for free. You just add it to a bag made of, say, an old towel or shirt. Set it in the stage to steep for a few days, apply to the soil before you start planting and bury the used bag. You can use manure tea to get those roots, especially for roses.


Mix a few tablespoons of molasses, 1-3 should be fine, to a gallon of water to make a simple, molasses tea. Simply pour onto the plants, and they will grow larger and healthier. Molasses is awesome because it increases the good bacteria to feed microbes, leading to an increase in soil microbes.

Cat and Dog Food

Any type of dog food has the protein and nutrients that will enrich the soil. Prepare your garden by tossing dry pet food onto the soil. Turn it and water the soil, and just let it decay.

Wild animals may be drawn to the scent, so cover the spots with cardboard until it’s done decomposing. Keep the cardboard wet, cover it with mulch and water every week for 4 weeks.

As an alternative, you can use soybean meal, spoiled grains and alfalfa pellets. Avoid high in sodium products!


Weeds of all types are welcome in fertilizers! Nettles, chickweed, horsetail, comfrey and burdock make excellent natural fertilizers. You can use them in a variety of ways to either speed up your compost or simply make your own. For weeds that have not flowered yet, dry them in the sun, chop them and make into a mulch.

Weeds offer high levels of nitrogen. Borage shares nutritional properties with comfrey. Dry borage whole, and put it in a compost tumbler. Some people add a bunch of the leaves to a 5 gallon bucket of water — they weight the leaves using bricks to make sure they are covered completely.

Stir once a week for 3-5 weeks until it’s a gooey substance. Dilute 1:10 and drench the soil with the fertilizer.


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