At some point, the plant will use up the nutrients in the rhizosphere and you have to make a choice, 1) use a conventional salt-based fertilizer, or 2) use an organic bio-stimulant/fertilizer, such as Be-1.
The challenge with conventional fertilizers is that they often contain salt (sodium-nitrates), which can have a sterilizing effect on microbes in the soil. Since microbes help turn nutrients into usable forms for plants, this means that not all nutrients are being converted into plant-available forms; hence, not quite reaching full efficiency and usually requiring increasingly more fertilizer to achieve the same effect. Often the excess will leach and may end up in our rivers, streams and oceans, causing such phenomenon as algae blooms, which kill salmon, and sterilize our waterways.
Instead, if you add Be-1 to your compost or tea to inoculate or add as a top-dressing to established plants, then the amino acids will exponentially increase the bacteria, fungi and protozoa, maximizing use of nutrients in the soil and releasing them slowly.
As these nutrients are used up, you can replenish monthly with the natural nutrients in Be-1's NPK of 3-6-5, which all microbes need to maintain this symbiotic cycle. Then add further N, P or K as necessary for your particular plant needs.
Using Be-1, over time, you will likely find it has higher efficiency, which means less fertilizer, herbicides and pesticides. Most importantly, your food will not have that dry, slightly sour taste that often results from conventional fertilizers, rather a noticeable and enhanced natural taste.