Before planting, i.e. when mixing soil, mix it in common garden soil, add some coconut soil or vermiculite, and then sow.
When planting, the bottom is the soil, then spread some organic fertilizer on the soil surface, and then cover it with a layer of soil to plant things.
When the crops grow to a certain stage, the growth of the plants is obviously weakened at this time, so fertilization is needed at this time. We can dig a small ditch next to the plants, and then bury the bio organic fertilizer.
In addition, if you don't want to get too much bio organic fertilizer at one time, you can also mix it with water and sprinkle it on the surface of the soil. If you want to get less at one time, you can apply fertilizer many times.