Something is wrong with your grow room if this is your sixth week of flowering and still no bud development. I just recently wasted the same amount of time. But things are going good now cause I found my problems.

I found I had light leaking into the flowering area during the dark period. So I covered every little beam of light I found during the dark period and now after 10 min in the dark I still can't see my hand in front of my face. Problem #1 solved.

Next, I knew that my little ladies needed new air everyday and yet I still deprived them, waiting for funds to be able to tap into the ducting. I could have open the air ways and have a hot grow room or see if they flowered. I chose to wait and find out that they only grew hairs like your plant. But now I have constant air flowing through the room and the temp stays at 76 - 80 degrees. Problem #2 solved.

So various999, check all possibilities of why your plant hasn't grown buds.