when to use nutes

i planted some white rhino seeds in rockwool and they sprouted, there under some cfl's right now but once there bigger they will go under some 600w MH lights. i wanted to know is too soon to give nutrients? so far iv been watering with distilled water

yes dont do it.. they dont get nutes till there 3-4 weeks old.. if ur growing in soil that is..

im growing in hydroponic