Are the brown hairs on the bud a issue and if so is it too late

**sinsemilla**

that looks like pollination/damage to me. best to check for hermis and sacks on the plants. also don't touch the tips of the buds as it can damage them.

is there a fan pointing directly at this cola? probably have to get colder than mid 60 to kill pistils. That's just the borderline where some chemical reactions in the plant start to struggle. i.e. the cause of autumn colors is one of those effects. wind burn, excessive heat, excessive light, pollination, natural aging... rule out what you can and what remains is the likely cause.

The pistils on a cannabis plant turn brown as a natural part of the flowering process. At first, pistils are white and upright, because they are actively receiving pollen. As the buds mature, these hairs start to dry out and change color from white to orange, red, or brown which indicates that the flower is ripening. However, pistils can also turn brown earlier due to environmental factors such as heat, light intensity, or physical contact. What really matters for harvest timing are the trichomes, not just the pistil color. Pistils are a general indicator, but trichomes show the actual maturity of cannabinoids

Dark brown looking or crispy on the tips is normally indicating she has been fertilized. Unfertilized normally turn bright orange or some shade of deep orangey brown. Again it's a genetic thing too so there are always small differences but it looks to sensimilla no more!