I suggest to put the seedlings as close to a fluorescent bulb as you can. transplant them into a pot with pro mix, after seeds germinate. Don't over water them! After may 24 weekend put them in a big pot outside in full sun light. I hope this is of some help too you, you can always come back and...
I would start to flush them out or wash them out as I call it, when the buds are full of red hairs, hardly any white hairs left. When in doubt, wash them out, it's alwyas worked for me..