hi sinky,i am very new to growing myself but what i have learned is
if your plants are not in totaly sterilised soil they dont need nutes at that age,they will grow quite happily with just water and light(i use 24/7 and they love it).
when they are that young if you want to use nutes put a week solution in a spray bottle and foileer feed them as many times a day as you want but use a pure water spray in between so no residue builds up.
dont try to rush em dude:thumbsup: