I have a plant in it's 4th week of growth. it is only 4.5 inches tall and has few leaves. it has recieved the same amount of light as a second plant, yet this one is 6 inches tall with lots of leaves, a new node coming up about every 3 days. the smaller plant has smaller leaves sprouting from each node. why has this one stopped it's vertical growth? :confused: can i do anything to help it along? the lights are 2 inches away and i dont know what i can do to increase the growth. any suggestions??