Everything here is geared towards maximizing your harvest yields. There are specific fertilizers here in regards to plants and growth cycle. While some fertilizers are applied when you plant in order to encourage microbial growth that in turn enriches the nutrients in your soil that your plants crave, others are added later such as 'bloom' fertilizers that will increased the number of flowers on your plants that will lead to bigger harvest. Other fertilizers target different times in the growing cycle when a plant is likely to be suffering from a lack of a key mineral. By fulfilling this need at the right time, you will end up with more produce than what you'll know what to do with.