Barneys White Widow XXL auto (First Grow)

Not "fox tailing". You still have 4-5 weeks at least (or more) to go...............buds will be completely different to what you think is going on now and you will probably be wondering why you were ever worried!

Everything looks fine for week 7 – no real signs of foxtailing yet. Buds are just stacking and still have time to fatten up over the next 2–3 weeks. It’s pretty normal for autos (especially sativa-leaning types) to look a bit skinny at this point. Just stay steady and keep conditions stable. They should bulk up nicely!

That's some monumental stretch more than I'd expect from where you switched to 12/12. Because we go generally from 18 to 12, if you still want to keep the high DLI when you switch to 12 you need to up the ppfd quite significantly to make up for the loss of 6 hours. If you keep the plant/light at the same distance and same ppfd as she was at 18 when you flip to 12 she will stretch very hard to reach the higher levels of ppfd required for the shorter flower period of 12 hours. Can't tell from the photo tbh but you should look to top at least once or twice this will encourage lateral branching and plant will spread wider as opposed to taller. I'd be very proud of myself if it was my first grow, well done Mr dmac, looking forward to seeing how much you can pack on those leggy ladies. Best of luck bruh.

Didn't look like a mutant till flower. Cannabis plants can excrete up to 40% of the carbon they fix through photosynthesis from their roots. This carbon is released in the form of root exudates, which are substances secreted by the roots. These exudates are a significant source of carbon for soil microorganisms in the rhizosphere, the area of soil directly influenced by plant roots. The more carbon fed to microorganisms, the higher the spike in ec. Possible but not sure. What I am sure of is as flower progresses and more carbon is placed into medium the wayer retention can increase, potentially limiting root respiration. Stress itself can come in many forms, temp, light, ec, all sorts, if the plant has too much stress across all the possible stress metrics then it just freaks out. Looks more like a stress response from possibly weak genetical lineage made her go wonky imo, wouldn't be surprised if you find a few seeds in there come harvest. She may be a little developmentally challenged but given she came this far doesn't necessarily mean she won't smoke well. Hope she works put for you there.

Genetic mutant that will never amount to much.............cut your loses and start again.............this plant will be a waste of time and effort........unfortunately.

Shitty genetics... autoflowers seems to have this trait more often than photoperiods.. similar to a dr grinspoon trait. excess spiraling and lanky side branching could be light-related too, but just looks like an autoflower that shit its pants to me.