First Time Grow! - White Widow Max Auto

Approaching day 70 of the white widow max auto grow! For the record, I am going with the recommended "84 and out the door" with this lady, so just a little over two weeks left. I have noticed several things since last week. - A lot of leaves are starting to die off. I only trim off the leaves that start to turn brown. - One of the COLA's has purple leaves. None of the others have purple leaves, so that is interesting. - The smell is starting to resemble a dispensary. It smelled good before, but I didn't have that thought cross my mind until this week. - The trichomes are starting to look more milky instead of mostly clear. Regarding the COLA I accidentally snipped last week. I dried it, and tried it. It gave me an energetic and major headstone high. I did not notice any odd tastes (I have heard people flush their plants in the last 1-2 weeks to avoid their cannabis tasting off, but I didn't notice anything) If I flush, I will likely only do it for a week.