15 BEST NATURAL FERTILIZERS FOR ORGANIC GARDENING

If your plants are failing to thrive, dropping leaves, turning yellow, or diseased, it could be an imbalance in your soil nutrients that’s killing your plants. In Today’s article, let’s look into a list of 15 most useful and powerful organic or natural fertilizers that can bring a revolution in organic gardening if used properly. We will also learn how to use these and also show you some organic fertilizers you have never heard off before. And finally we will show you how to make a cocktail mixture out of these for ease of application and calculate the final NPK value of this powder.  

Let’s start with a brief introduction and basic concepts before we list out the fertilizers. Please do not skip this information.


We all know that the Major nutrients or Macronutrients found in fertilizer are nitrogen (N), phosphorus (P) and potassium (K) – that’s NPK and each fertilizer has a ratio of these nutrients mentioned on the labels. This NPK ratio is very important to decide what you want to achieve from your plants. Nitrogen (N) is required for growth of foliage, that’s leaves of the plant. Phosphorus (P) is important for strong root growth and flowering and fruiting. Potassium (K) helps regulate important functional processes in a plant and make the plant healthy.

The Minor trace elements or Micronutrients are also important and include iron (Fe), boron (B), chlorine (Cl), manganese (Mn), zinc (Zn), copper (Cu), sulphur and many more.

We also know that the use of Chemical or Synthetic fertilizers is harmful and hazardous to all living organisms on earth.  On the other hand, we also know the benefits of using organic fertilizers.

Having said that, Now let’s list them one by one with few important points on each of them. Please watch it till the end!  And by the end of this episode, I bet, you will be really amazed to know so many organic options for fertilizers and many non-animal substitutes for vegan gardeners.

  1. Cow Dung Manure: This has been the universal fertilizer since ages. Not only cow dung, you can also use horse dung, goat dung and so on.    But remember, it has to be fully decomposed to be used as a fertilizer. Generally, It has a NPK ratio of 2:1:1 +/- 0.5 and this has a decent amount of all three major nutrients. Apart from mixing it in your potting mix in about 30% proportion, generally a handful of cowdung once every month or twice a month is good enough for most flowering and fruiting plants. You can find a detailed post on cow dung tips and tricks.
    BUY ONLINE: Cowdung https://amzn.to/2VLWldO

  2. Vermicompost: This is nothing but earthworm poop or earthworm castings. Generally, It has a NPK ratio of  2:1:1 +/- 0.5 and can be used in place of cow dung manure or a mixture of both. Apart from mixing it in your potting mix in about 30% proportion, generally a handful of vermicompost once in a month or twice a month is good enough for most of flowering and fruiting plants.
    BUY ONLINE: Vermicompost https://amzn.to/37uVim4

  3. Blood Meal: This fertilizer is created using powdered animal blood. Generally, This has a NPK ration of 12:1.5:0.5. This means it is high in nitrogen, and low in other elements. One important point to remember while using blood meal is it is highly acidic and over dose can cause fertilizer burn which usually happens with chemical fertilizers. But the advantage of using blood meal is its highly fast acting like the chemical fertilizers and can be used to quickly heal ailing plants with nitrogen deficiency. Add half to 1 teaspoon near the roots of the plant and water the plant and You should see the results within 2 weeks.
    BUY ONLINE: Blood meal https://amzn.to/2YC4EbI

  4. Fish Meal: as the name suggests, its made from fish and fish bones.Generally, It has a NPK ratio of 5:2:2 or may be different depending on the company label. This too is fairly fast-acting fertilizer similar to blood meal and apart from nitrogen, It has decent amounts of phosphorus and calcium as well.
    BUY ONLINE:  Fish meal https://amzn.to/2C6GQFt
  5. Chicken or Poultry Manure: This generally has NPK of 4:3:3 +/-1 and has more nitrogen content than cowdung. This is also fast acting and hence over dose can burn your plants. Use very little dosage, similar to blood meal. The Best way to use these 3 fertilizers – that’s blood meal, fish meal and chicken manure, is to add a small amount to the soil before planting or to quickly heal a plant with nutrient deficiencies.
    BUY ONLINE: Chicken manure https://amzn.to/3e1tsAr

  6. Bone Meal: This needs no introduction. This is made from powdered animal bones which is available either as fine steamed bone meal powder or coarse powder for slower release, that’s for the entire growth cycle of a plant. This generally has NPK of 4:20:0. This is high in phosphorous content and very important for strong roots and healthy flowering and fruiting.  Adding one table spoon per medium sized container mixed into the potting soil is sufficient for the entire growth cycle.
    BUY ONLINE: Bone meal https://amzn.to/3htq4Am

  7. Rock Phosphate: This is a vegan alternative to bone meal with high phosphorous content with NPK of about 0:20:0. You can either add this while you are preparing potting mix – 1 table spoon mixed with a potting mix volume of a 12 to 15 inch container or use 1 to 2 teaspoons of once in about 3 months per plant of its already in soil or potted. 
    BUY ONLINE: Rock phosphate https://amzn.to/2Ty5m8l

  8. Seaweed: This fast-acting fertilizer is available for free along most coastlines. Its NPK is about 2:1:4. Its high in potassium as well. It also has plenty of micronutrients like zinc and iron. Seaweed is considered highly beneficial to plants that need high levels of potassium. Commercially it’s a available as either Zyme Granules or Seaweed liquid extract which also contains humic acid, fulvic acids and other useful amino acids. You can add half to one teaspoon per plant once in a month to nourish them with seaweed nutrients. Liquid seaweed extract can be used to quickly revive an ailing plant of nutrient deficiencies by spraying it on the leaves – that’s called foliar feeding and also by watering the plant. The dosage is 10 ml per litre of water. Make sure you spray more on the underside of the leaves, because the stomata or the openings are more in number on the underside.
    BUY ONLINE: Seaweed zyme https://amzn.to/30HoUeW Seaweed liquid https://amzn.to/3dZRtYR

  9. Humic Acid and Fulvic Acid: These are rather growth enhancers and final break-down constituents of the natural decay of plant and animal materials. Humic acids are an excellent natural and organic way to provide plants and soil with a concentrated dose of essential nutrients, vitamins and trace elements. Humic acids chelate complex nutrient compounds in the soil to convert them to a form suitable for plant absorption. This reduces the fertilizer usage by upto 30% and increases flowering and fruiting by up to 70%.  
    So, How to use this? The Dosage is 1 teaspoon per litre of water. Mix it well and water 1 cup, that’s about 250 ml of it per plant. If you are using liquid add 3 ml per litre and water your plants. You should see results within 2 weeks.
    BUY ONLINE: HUMIC acidhttps://amzn.to/3h7kGTr

  10. Organic Micronutrient Granules: This type of fertilizers contains both major NPK nutrients and micronutrients like Calcium, Sulphur, Zinc, Copper, Iron, Boron, Molybdenum, Manganese, Chlorine, etc. You can add about 1 teaspoon of it per plant once in a month. You can watch a detailed post on various micronutrient deficiency patterns.
    BUY ONLINE: Organic micronutrients https://amzn.to/2BjAMZT

  11. Neem Cake and Neem Cake Powder: This is both a good fertilizer as well as a good soil pesticide. It’s actually the left over product after neem oil extraction, any cake for that matter is a left over product. You can mix about 10% of it while preparing your potting mix to avoid soil pests. You can also sprinkle it around your existing plants. You can also make a liquid fertilizer or neem cake tea by adding one handful per litre of water and allow it to brew for atleast 24 hours and then water your plant directly or by further diluting in water.
    BUY ONLINE:  Neem cake https://amzn.to/2AypK2Q

  12. Mustard Cake and Powder: This is another natural source of NPK and increases flowering in plants. The use is similar to how we discussed for Neem cake powder.
    BUY ONLINE: Mustard cake. https://amzn.to/2XWZ04V
     
  13. Epsom Salt: This is the best source of magnesium for plants. It’s chemically magnesium sulfate. Magnesium is the central most atom of the chlorophyll molecule. You all know chlorophyll is very essential for photosynthesis – that’s plant food production. You can watch a detailed post on the uses of Epsom salt and how to use it.
    BUY ONLINE: Epsom salt  https://amzn.to/3d02ZlB

  14. Soyabean Meal: This also need a special mention, especially for vegans who can use this as a substitute for bone meal for phosphorous supply.
  15. OTHER ORGANIC FERTILIZERS: that need a mention, like Alfalfa Meal, Azomite, Cotton seed meal, Feather meal, Green Sand and so on.

MAKING A COCKTAIL:
Now let’s see how to prepare the cocktail fertilizer mix. With so many Organic Fertilizers in hand, using them all one by one is a tough task. So what I always do is mix them all and total the NPK value approximately and use them with a certain dosage per plant. This time I decided to mix only the dry stuff excluding vermicompost and cow dung manure. Let’s mix all the other ingredients and make a cocktail mix and total the NPK value and use accordingly. Do not worry too much about over dosage, because most are organic fertilizers and will not harm your plant. To get a better idea on totalling the NPK and making this cocktail universal fertilizer, You can watch a detailed post on how to make a mixed fertilizer recipe.

Happy Gardening!

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