hey there MMMMMM, actually the main point is that the small plant (first few weeks) doesnt need much water 20-50 ml and for sure doesnt need much nutrients, so if the soil has a lot of nutrients or if you add nutrients you will cause nutrient burn on the plant and it will stop growing (so it's a waste) that's why you shouldnt fertilise the first two weeks for sure and when you start only start at half and gradually increase it until full dose. Hope this helps ! 🚀