First grow wedding cheesecake auto

12 hrs it makes a week since the seeds were planted in the dirt... the first 5 days I watered them twice a day bc I didn’t want them to dry out bc that light dries up the dirt quick being 1000w.. cut down to watering once a day when I get up and it seems to being doing ok... I’m growing in black and gold natural and organic potting soil with 25% perlite... with that being said when does everyone think I need to start with nutrients???? I have the big 3 from fox farms ( grow big, tiger bloom, and big bloom).. my plan as of right now is to hold off til they r a lil bigger, I was thinking of starting nutrients when they turn 2 weeks old... when I do start them I’m thinking 1/8-1/4 strength... what do u think???