Posted: 26/05/2012 at 06:34
Okay, the very first leaves - cotyledons - that appear after germination are what nourish the baby plant. As true leaves form and nourish the plant, the cotyledons' use is over and they usually change colour to yellow or almost white and usually fall off. Or you can take them off once they've faded.
Good idea not to have the mix too wet, too.