Have you considered the nutrient source you are feeding your plants? There are so many things to consider when planning your grow strategy, and nutrients play a significant role in the success of your plan. The two primary sources of fertilizer or nutrients are organic or synthetic. It can be further broken down as either plant or animal-sourced nutrients. Deciding whether to use plant or animal-based products can be based on price, plant yields, absorption rates, your personal preference, or any combination of criteria. Sustainability may not play a part in your decision, but maybe it should. Let's examine the most current research to get to the heart of plant nutrition basics around sustainability.