How to Make an Effective Organic Fertilizer


Commercial fertilizers can give oomph to plants in growth and color but they also contain chemicals that build up in the soil over time. You can make an effective, slow-release, organic fertilizer that conditions the soil for future use while building strong cell structure of growing plants. This will make them more tolerant to stresses such as pests, disease and environmental issues. Organic fertilizers are efficient and inexpensive.

Step 1

Obtain ingredients from a farm or garden supply store. Most farm and garden supply stores are beginning to stock kelp meal for its recognized benefits and growing popularity. In the event it is not in stock, it can be ordered.

Step 2

Measure 2 quarts kelp meal and pour into a medium-sized plastic tub. Kelp meal is another name for dried seaweed and contains more than 70 vitamins and minerals. Kelp meal also contains natural growth hormones and regulators that have the ability to build plant resistance to frost, cold and other stresses, including those caused by pests and disease.

Step 3

Add 1 gallon bone meal. Bone meal is high in phosphorus, relatively inexpensive and easily found in both garden supply stores and farm centers.

Step 4

Mix 4 gallons soybean meal into the kelp and bone meal. Choose an organic soybean meal to avoid meal made from genetically modified soybeans.

Step 5

Add 2 quarts dolomitic lime to the organic fertilizer mixture. Dolomitic lime can be purchased from an agriculture supply store and is beneficial for adding calcium and magnesium to the soil. Avoid lime labeled as "quick lime" or other versions of chemically active limes.

Step 6

Mix 2 quarts agriculture lime into the organic fertilizer blend. Agriculture lime is high in calcium and is beneficial to the structure of the soil.

Step 7

Using a hand trowel or hoe mix all ingredients thoroughly. This will result in 6.5 gallons of organic fertilizer. Use approximately 1.5 gallons of organic fertilizer per 100 square feet of garden area.

Things You'll Need

  • Medium-sized plastic tub
  • Hand trowel or garden hoe
  • Kelp meal
  • Bone meal
  • Soybean meal
  • Dolomitic lime
  • Agriculture lime
  • Quart container (for measuring)
  • Gallon container (for measuring)


  • "Mother Earth News" magazine: A Better Way to Fertilize Your Garden; Steve Solomon; Late Spring, 2010
  • College of The Virgin Islands: Organic Gardening - Soil Fertility
  • Oregon State University: What Are the Nutrient Values of Organic Fertilizers?

Who Can Help

  • University of Alaska: Make Your Own Complete Fertilizer
Keywords: homemade organic fertilizer, effective organic fertilizer, organic fertilizer

About this Author

Patricia Hill is a freelance writer who contributes to several sites and organizations, including eHow, Associated Content, Break Studios and various private sectors. She also contributes to the online magazine,