Hey there it’s been awhile since I grew but I just started again and I have an autoflower that is growing very weird and I just noticed it a few days ago. Growing in bushdoctor and feeding fox farm nutrients. It’s a fruity pebble auto flower. The leaves are doin this weird curl down and they are extra green, more green then the rest of the grow in my tent.
The shiny dark green color and the tips turned down doing the claw indicates nitrogen toxicity. More details on your grow and feed habits would help.
I just actually started feeding my autos because I was told to feed them like regular photoperiods because I have been getting mixed information. I was told not to feed the autos at first then I was told to feed them like normal…. But I just started feeding them about two weeks ago and I feed twice a week otherwise regular phd water in between feedings, the other two in the pic are the same kind of autos with the same feeding schedules and they aren’t doing this.
Some plants can take more than others. Nutes build up over time, raising EC and dropping ph.
I’ve read in a few places to dial back nutes on autos.
If the medium you are using was amended with nutrients did you check the run off before using nutrients. I feed autos and photos the same at 850 PPM average but don’t start feeding in amended medium until the run off is less than 800. @Growdoc nailed it on the toxicity. I would water feed only the next round and test the PPMs and PH. What light and intensity are you using. The long node spacing resembles inadequate lighting intensity 