They are weak, u said it yourself, if u put a plant under a weak setup, u get a weak plant...4 weeks.... Look around some grow journals and see what 4 weeks is...Hey here r some clones that i got at a friends house... The set up is weak but its not my place so i cnt realy make it better... But the plants on the front left back left and the back middle are mine.. How do u think they r doin so far they r purple kush