For little seed lings you can get a plastic (clear so you can see root growth) and fill it withe some light potting soil. Youll find some in a hardware store. Itll contain some peat moss and vermaculite. This should be good for those little sprouts. While your ther get all your other equipment like lights MH of cfls for vegatation.HPS for flowerin when you turn the lights 12/12. Perlite( add this to your bigger pot when you transplant the seedling for good drainage.) And some more light potting soil mixes. Get a pot the size8x8x8 should be fine for each plant. Fertilizer. NPK ratio (Nitrogen,phoshorus,potassium)of 20-20-20 for vegatation and 8-34-8 or somethin around that for flowerin.