It is not the high proportion of elements in best vegetable garden fertilizer that helps your garden to flourish, but the required amount in the right blend that triggers plant growth. For example, organic fertilizers have high nitrogen, but this form of nitrogen is found in an insoluble form. It takes time to break down in the soil and release nitrogen. However, it offers an effective amount of nitrogen release compared to synthetic fertilizers. If you are using a fertilizer with lower content of NPK, you might need reapplication at regular intervals. However, excessive amounts of elements can lead to adverse effects as well as fertilizer burn. On the same note, organic fertilizers have minimal risks of fertilizer burning the plants, and effectively release NPK along with micronutrients. This encourages microbial life thriving in the soil, thus enhancing the nutrient value of the soil. Thus, the NPK proportion required for every garden differs as per the plant type and soil requirements.