Leaves curling up and tips dying in flowering

What light are you running and how many inches from light to top of plant?

What you're observing in your plants is likely an advanced case of hidden hunger. Could be be Mg or K. Both are common.
Feed your plants with a lower pH. You still have a some time to go before they're finished. They wont recover, but you can limp them to them to harvest.
Also, I think you're light might be a little to intense.

And just an FWI, your vegging is already displaying signs of an early Mg deficiency. Get on top it now before it progresses.

SmoltimeGrow said:

4 weeks would put it at 15-16 weeks for an autoflower that takes 10-12…

idk man; I’m doing research on it and finding it’s something that could be fixed with some calmag and I probably stopped nutes a week early.

First time doing autoflower. So I’m not surprised if I misjudged the final couple weeks of flower; but I just don’t think there’s more than 10-12 days left before 48 hours of dark. I think I flushed early and just messed up my timing. Anywho, thanks for giving me something to consider

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Autos do NOT run on your time or breeders hype. Your skill , environment , lighting for the grow also plays into it.
Do not hang on length of grow. Plant will finish when it finishes. No bottle or YT bullshit will change that. You “ should “ be on a good bloom feed to supplement the needs of the maturing flowers , if not , then problems come from your hands.

Clusterfuck Tuesday said:

What light are you running and how many inches from light to top of plant?

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two Mars hydro SP150s in a 5’ x 2 1/2’ tent. Raised the lights to about 24” from canopy because I was also worried about light intensity being the issue. But that hasn’t seemed to make any difference. The light coverage and penetration is still plenty strong though, so I feel no need to lower them.

Clusterfuck Tuesday said:

What light are you running and how many inches from light to top of plant?

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I’ve come to the conclusion that it’s light intensity issue. They were fine until flowering, but I think when I removed the larger fan leaves that were covering bud nodes, it took away the needed protection.

I came to this conclusion because I’m noticing light burn on my photo plant that is in vegetation and has been given a strict feeding diet. It’s kn the same tent, about same height, and same foliage density as my flowering plants. So this makes me assume light intensity is the problem.

The lights are now 36” from the canopy and I’ve added more airflow to keep heat from rising pass 80. Will update when o harvest to lyk if it helped