Well, you didn't read my post then so let me straighten everybody out.
If you create a nutrient deficiency to get purple, more than likely you will come up short on quality.
However, if you grow a dedicated purple strain which turns purple WITHOUT any nutrient deficiency, than you will have great weed which is, well, purple, or blue.
As I posted above there are purple strains out there that can produce 24%thc....okay, that's medical marijuana folks.
Do a bit of research before you post something....or make sure you throw in a big IMO.
out.