CapnChronic003 said:

This photo is of week 9 prior to harvest. Noticed in week 5 this flower top was flattening, hardening and "finishing" while the rest of the flower continued to grow. Currently my best assumption is either light leak stress or maybe any other form of stress. However, this isn't prevalent in the rest of the room or even on the entire cultivar. It is randomly occurring which makes me think it's not light leaks or something like that. Any ideas? Anywhere I can find some specific information on this?

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One drop said:

How low is your light I’m having a little of same problem so I but my light up to 36” above canopy and it seems to have stopped the start of fox tailing , regards Od

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threatco said:

I would consider that an early stage fox-tail.

I am no expert. A google of the term will tell you about as much as I know.

Here is one relevant link. https://www.royalqueenseeds.com/blog-how-to-spot-and-handle-cannabis-foxtails-n638

I can tell you I have had it happen, and while not as pretty, the bud is just as good as the rest of it and smokes fine.

Good luck!

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CapnChronic003 said:

The light is fairly close to the top flowers but I've been measuring PAR and leaf temps and nothing is out of the ordinary. Under the LEDs we use, I've had flowers finish just fine literally inches from the lights so I've been tending to not lean towards that as the problem but I guess anything is possible at this point because I can't put my finger on it.

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Terpeneluv said:

Foxtail, at least with my experience. In my case, I believe it was from too much heat, but it might be different with yours.

What's your temp and humidity?

Some actually like it when that happens and I don't think it effects the potency. I could be wrong, but I couldn't tell.

Hope this helps.

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