Question About Cannabiogen Sandstorm

I was wondering if anybody is growing Sandstorm. I need to know that when it turns purple does it do it from the start or later in the flowering stage.

Reviving this thread for anyone planning to grow Cannabiogen's Sandstorm. I have one currently outdoors and it is gorgeous. Lemon smell, purple color, and dense nugs covered in trichomes. Real hash plant look, it started to turn purple at the beginning of this month and is now purple on the buds with green leaves.