It might be harder than you think!?
Stimulation and improving the conditions of your plants
If you are a home gardener, it is important to understand the role fertilizing can have in stimulating and improving the condition of your plants.[1] In a perfect world your soil would grow plants perfectly without additives. However, in reality most garden soil needs a little boost by adding organic fertilizer. Organic fertilizers are different from chemical fertilizers because they add organic material to the soil in addition to promoting growth. Choosing the right organic fertilizer requires that you figure out the nutrient needs of the plants you are growing and that you pick the right product to supplement your existing soil.
1,
Compare fertilizers. Read the packages of different fertilizers available to you to assess how much of certain nutrients they have. You will want to look at their ingredients, the pricing, claims made on the labels, and special instructions for application.[9]
Different gardening and home improvement stores will have different products. If you don't like what you see at one, go to a different store.
2
Locate the product that meets your nutrient needs.[10] The numbers on an organic fertilizer label refer to the percent of three key nutrients in the product: nitrogen (N), phosphate (P), and potassium (K). For example, a fertilizer that is marked 6-12-10 will be 6% nitrogen, 12% phosphate, and 10% potassium. These nutrients are always listed in the same order.[11]
Other nutrients will be listed separately.
You will want to pick whatever product you think will supply the right nutrients, is sold in the right amount for your purposes.