Purple Punch (?) Auto in Week 8: Brown/Yellow Leaves on Buds

[FreeJeff]

Hi, this auto is in the 8th week. Buds are growing nicely but the leaves are turning yellow and brown. My impression is that this plant's days are numbered. So here are my questions:
1. Should I be trimming the brown/ yellow leaves?
2. Until recently, I was giving in Bloombastic, but now just water. Is this correct?
3. How long should I wait before harvesting?

PICS: https://imgur.com/a/U3xSaDU
Thanks!

[FreeJeff]

Thanks! I'll try to get some better magnification. The breeder says 9 weeks from seed. I was worried that when the leaves turn brown I'll lose the trichomes.