Around how long left?

lots of plump left... it varies how quickly they fill in, but those calyxes are not plump around the hairs. You don't have to scope trichomes, yet. when it looks like they are no longer getting fatter, that's a good time to start scoping trichomes. also, no way that is 4 weeks of flower. This is how myths perpetuate... it's not in flower when you see something... by that time it's already been in flower for a while. This is closer to 6 weeks of flower. 4 weeks is a bunch of fluffy white hairs at nodes and terminals. A rare faster flower might be a few days ahead of that. if comparing to a normal timeline of a photoperiod, you are closer to ~6 weeks and ~3 weeks remain.

About 4 weeks left still 😂, I'm unaware of any strain that finishes in 4 weeks flower. It is normal for these" hairs" to turn between and New white ones pop up throughout the flowering cycle, this is how the bud develops and builds

Two weeks with fertilizer, then rinse thoroughly, and 5-6 days with clean water. You're almost there, resist the temptation to cut too soon 😉

Still has a good way to go At week 4 of flower she’s just starting to bulk up you’re probably looking at another 4–5 weeks before harvest depending on your environment and pheno. Keep feeding well and let her stack the best part is just starting

1-2 weeks