Should I start flushing

Yeah I have no idea what these plants are even, so not sure on the flowering period.

If it's been 5 weeks, give it another week of nutes. Unless you know for certain that this plant has a shorter flowering period?

Hoodoo, the 3 pictures are the same plant. The first picture of a bud though was from a few days ago and with no flash. It has been about 5 weeks since I changed the light cycle to 12 and 12.

Hairs changing typically means mid-bloom to me. The 3 pics look like 3 different plants! Zooming in on the 3rd pic, I see milky trichomes and no amber. It still looks like it has some development in its future. I typically give nutrients until the trichomes start turning amber, then I flush. I prefer very low amber trichomes (10-20%) to get more of an energetic high though.