I took this multi when I had a really bad hair cut, my hair grew an inch a month!! it was amazing (my hair grows fast but this definitely sped it up)
http://www.gnc.com/GNC-Womens-Hair-Skin-Nails-Formula/product.jsp?productId=50109916&KPID=19772945&mr:trackingCode=68558C4E-A927-E511-80F8-0050569475F3&mr:referralID=NA&mr:filter=172551794234&mr:tid=pla-172551794234&c3ch=PLA&mr:ploc=9004778&mr:ad=104095794194&mr:iloc=9004747&mr:store=&mr:device=c&mr:match=&CAWELAID=50109916&mr:adType=plaonline&mr:keyword=&c3nid=19772945&pla=pla_19772945&gclid=CJ_Rq9iw3M0CFcRahgod1AAKRA&eesource=CAPLA_DF:50109916:GNC
check the sup facts, those are all things that aid in hair growth. this was also apart of my NBE! vitamin bs are great for nbe
I also used the inversion method.
http://www.wikihow.com/Use-the-Inversion-Method-to-Grow-Hair
just like in NBE, massage / blood flow to the area will promote growth
try to not wash your hair as much, drink tons of water, stay away from sugars, brush it from the ends up, don't keep a tight pull on it (hair ties, etc. I use loose hair clips) I know all the tricks

my hair used to be just above my knee! I think growing your hair back out is a wonderful idea! beautiful