First watering after sprouted plantule stage

Its completely up to you how confident are you in your nutrients ? is really the question here personally working for a nutrient brand myself I do feed seedlings though only because I know our feed wont kill them I never used to and I still use RO water up until the point your at now to germinate first watering ect though its your plant what i advise bro test it on a an extra plant if you have one first and then if it works do it on your others it can be pheno dependent too though some plants love feed others react differently in early stages in my experience anyway. I dont go go with this 1/4 nutrient business the feed tables are worked out for a reason. the plants need specific elements at specific times and im pretty sure the average grower does not know the hugely complex botanical processes that go on within the plant. I use full strength week 1 nutrients with my seedlings and they grow fine :) best of luck