If plants grow in the ground, ideally take soil that has already been mixed with fertilizers so that there is a good start, then after 3 weeks you can start feeding the roots, because good roots are the key to a good harvest. If the plants grow on a coconut substrate, then you already need a full set of fertilizers and you need to feed them from 2 weeks of plant growth and preferably every 3 days so that the coconut substrate does not dry out.