Anyone know what this is ?

[Gward20]

Only happened on these 2 leaves. I looked on the deficiency thread and it looked like boron deficiency or potassium deficiency or phosphorus deficiency ? Please help

[GMO]

looks like grower damage to me buddy. maybe ya knocked that leaf against the pot or something at some point

at very worst maybe could be a little bit of older wind burn

nothing too worrying bud

[Nanook]

Looks fine tbh, just keep an eye on the rest for a few days.

[Gward20]

Thanks gmo & nanook. I haven’t even got a fan in that tent at the moment. I will keep a eye on it over the next few days and hope for improvement

[Gward20]

Is this a magnesium problem ? I have gave it a feed of calmag and a spray but it doesn’t seem to be going

[Nanook]

Id agree with mag - looks like its overfed too tho, I would flush then add a bit of calmag and lower base.

[Gward20]

That’s exactly what I done yesterday mate. Maybe leave her a few days and see what she is looking like

[sybarite]

I had what appears to be this exact same thing, similar interveinal fading, lower leaves going dry and papery like yours and eventually necrotic. Was chasing my tail for ages, thinking it was mag deficiency (it does look like that), or overfeeding, or VPD, so I flushed and it got worse. What resolved it for me was giving the maximum recommended amount of grow formula (BioBizz Fish Mix @ 4ml/l), so presumably mine was N deficiency, but since changing my light I haven't had to give them any grow formula for 2 weeks and they look very healthy, deep green, so was possibly some kind of lockout partly caused by inefficient lighting. Just my experience though, yours might be different (wouldn't want you to overfeed them following my advice), but worth bearing in mind.

[Gward20]

I had what appears to be this exact same thing, similar interveinal fading, lower leaves going dry and papery like yours and eventually necrotic. Was chasing my tail for ages, thinking it was mag deficiency (it does look like that), or overfeeding, or VPD, so I flushed and it got worse. What resolved it for me was giving the maximum recommended amount of grow formula (BioBizz Fish Mix @ 4ml/l), so presumably mine was N deficiency, but since changing my light I haven't had to give them any grow formula for 2 weeks and they look very healthy, deep green, so was possibly some kind of lockout partly caused by inefficient lighting. Just my experience though, yours might be different (wouldn't want you to overfeed them following my advice), but worth bearing in mind.

Thanks sybarite I wouldn’t be too gutted if it died tbh mate so it’s worth a try. I took 2 cuts from each Pheno so I have got the other one to fall back on. Thanks for the help mate