fertilizing

I am just wondering I am new to growing and I have about fourteen plants right now all in one big bin and they are about 3 inches tall I am just wondering if it is neccessary to fertilize my plants if so when should I start doing this and what is the best product to use I planted these about a week ago.

Are you using soil or hydro system? If soil you probably should replant your babies before their roots grow together and you can't seperate them!

wow, 14 plants is quite a lot, how big is your grow and veg room?