Copper style burning on the edges - Flowering Week 2

Can someone identify this? Is it nutrient/ph based? There are maybe half a dozen leaves with it at this point.

Only thing I can think of is that it could be the light slightly too close - recommended 60cm (23") but I'm at about 45 (17") - so I've turned the light strength back to about 65%

Also FYI to the internet in general, this is actual fucking scrog, the amount of internet mislabeled 'scrog' these days where its just 3'+ tall lollipop plants using the screen as weight support is ridiculous.

Strain is 818 headband and is a bit more needy/wimpy than my previous afghan kush X black domina grow. Tent is 0.8m, screen is about 0.6m (2'x2') and never fully fills out, generally get about 6oz.

I don't think a few odd leaves is much to worry about. Weird stuff will always happen in flower.

For the most part everything seems good

I would follow up on how much K you're feeding...or be sure your pH isn't conflicting with it. Good luck.

It did drop down in to the 4s for a few hours unnoticed last week it may just have manifested in the days following and look bad to my eye.

I can't identify it on any of the charts floating about google images though

I agree that a few bad leaves shouldn't be cause for concern. The whole crop looks a little light green to me. Your nutes may not be in an optimum balance.

You didn't keep your afghan kush/black domina? I have run it a few times now and can't decide if it's a keeper or not but some people LOVE it and keep asking for it.

Look like potassium deficiency


Edit: ooops @CannaCountry already pointed this out, I agree!

70's natureboy said:

I agree that a few bad leaves shouldn't be cause for concern. The whole crop looks a little light green to me. Your nutes may not be in an optimum balance.

You didn't keep your afghan kush/black domina? I have run it a few times now and can't decide if it's a keeper or not but some people LOVE it and keep asking for it.

Click to expand...

I just do 1-2 at a time from seed so not an option for me to keep them about, I would grow it again, enjoyable end product and showed no deficiencies with the same shit nutes I'm using this time around.

Using the outdated Dutch Master advance part A and B with another product Pro-PK professional potash which is p13% k15% at 1ml per 1L.

MrGreenFingers99 said:

Look like potassium deficiency

How to fix Cannabis Potassium Deficiency (K) Pics & Symptoms

Leaves with a potassium deficiency have yellow, brown, or burnt edges and tips. It may look like nutrient burn, but the leaf margins also turn yellow.

www.growweedeasy.com

Edit: ooops @CannaCountry already pointed this out, I agree!

Click to expand...

Thanks this is exactly the type of page I was looking for, I missed my PK additive in the first week of flowering so it very well could be that