Bit of a half-asses entry here… way too busy of late. Hopefully that’s resolved soon. Watching trichomes closely now, and did a big flush watering for both plants with FF Sledgehammer yesterday (7Dec) and I think Northern Light will probably get chopped within a few days, with Purple Lemonade fast on her heels, but we shall see! Still learning the ropes with trichome progression, for sure. It will be smoother next grow hopefully, now that I have my phone “microscope” attachment to start documenting them earlier.
Hey! This looks like leaf septoria (here's more info about it: https://www.royalqueenseeds.com/blog-leaf-septoria-yellow-leaf-spot-on-cannabis-plants-n678)
I'd recommend removing the infected leaves and controlling humidity (<40%) 🙌🏼
@James, well, I followed septoria guidance as well as possible. That is to say I removed all the potentially affected leaves on Northern Light, though Purple Lemonade would have been left with no foliage if I had done so for her, so I just removed the worst looking leaves. Still, gave the whole tent a thorough dry-out period. Northern Light has been pretty happy, and Purple Lemonade never started dropping foliage, so maybe she’s just a much hungrier girl than I gave her credit for and this was a CalMag thing. Or, as my partner has suspected from the start, just a bit of a sickly seed. *shrug*