Bubba's Gift

@onablueeyes, Here is what I suggest: get a second opinion! Open a Grow question here on Growdiary: take a pic out of your journal and ask if plants looks underfed! By any way I mean to be rude but light-bleached top buds are also not good.

from my knowledge, overall green fading away, yellowing turning to purple is a sign of P, K and macro elements like Molybdenum deficiency (I could check on Geoges Cervantes Loud Cloud site but I am pretty damn sure). When this happens in the very last week as a consequence of leaching out nutrients (giving only water some people call this a flush) this is an good sign that you are not ending with a final product packed with heavy salts build up. (see Mr Canucks grow on Youtube?...he always finish with fall colour everywhere.) On the other hand if you see this before buds have finished to fattening it's a tale sign that your plants does not have access to enough nutrients and minerals witch will lead to a lower harvest of buds that did not grow to their full potential (THC, terperne, resin, oil). Your friend is right about this genetic some phenotype can turn purple. But a healthy plant that express purple leaves will be showing it by going from very dark green to dark purple. And buds that are purple at fattening time you will see purple calyx and or pistils. But that was 2 weeks ago, If you are 8 weeks in now you are getting close to harvest?

@sativaman, really? Talking to a friend, he told me that this purple colouration of the leaves is typical of this genetics. I really do have to say that it doesn't smell much.