my first grow here, im using cfls. they are about 3in above my plants. the plants are about 10 days old. recently it seems as if they have quit growing and now the leaves are folding in half long ways and start to point upward. also the leaves are all a nice green , but the small round ones that first come out are starting to turn light green.they are in a general potting soil that i mixed with perlite. the soil has no added nutrients. could it be that i already need to start fertilizing ? any help is appreciated.