Auto Purple Kush Harvest Timeframe (photos)

This is my first grow. Not quite sure about harvesting timeframe for this - lots of incomplete or conflicting info out there so I thought I'd ask specifically for this strain. I have 9 colas, using LST. I'm trying to plan on a harvest timeframe and can't tell if I am about a week away or a month away. Thoughts?

Cannuk auto purple kush
Pictures are current, in week 8 (since germination)
Indoor, leds
Used Fox Farms nutrients in Coco Loco

Few weeks I'd say

Wow, thanks. That's very informative.