Day 78: (02/07/21)
If you consider the tallest tops "row 1" and then each major set of internodes going down the plants are sequential, how are the trichs looking on Rows 3 and 4? That's always where I check my trichs.
Keep in mind that 10-20% amber on Row1 will probably be nowhere near done on row 4, and with this plant, it seems to be able to sit at "some amber" for a few weeks while the rest of the plant matures. On the other hand, any brown/black trichs on Row 1 or 2 start to really make me look at harvest.
Also keep in mind that the tops might stop 'looking' bigger, i.e. they don't add volume, but they could be getting denser and more potent. The buds inside the plant you can't observe might also be adding weight. That's usually what I see on my lanky sativa photos, everything up top is g2g but then you get an extra 25% from the mids.