help please.....plants dont look too good!!!!

herkules said:

ok, this is my first grow. my friend is kinda coaching me through this but i am begining to doubt her methods. my he has me growing in rockwool cubes. my clones are a lil over three weeks old now and have been growing pretty good. i have the cubes sitting on a tray. this is not a hydro grow. the roots have come out the bottom of the cubes and have been for some time now. when i looked this morning all the leaves on all three plants are drooping!! all of them. i have not been over watering and not under watering. he tells me that the root growth is fine and not to worry but i have a feeling that i need to transplant these girls into soil.
can i put a big rockwool cube in soil? will it transplant ok????? please help. server is not allowing me to post pics.

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