New Grower A deficiency or a nutrient toxicity? Help please?

[JaPinkman]

This is a one month old Hindu Kush. My first autoflower and trying organic, outdoors. In a soil, coco, perlite, mix with it aerated about 30%. In the beginning I put slow release amendments in, so it's been about a month and I used less than the recommended amounts. I'm pretty confident that watering isn't the problem, and it spends it's days in the sun and seems okay with that.
The plant seems pretty dark green but maybe that's an auto thing. It seems like it's growing really slow but maybe the one LST that I did slowed it down,don't really know. About the end of week 3 I see this on the leaf margins, but mostly the middle leaves, not top or bottom, and it is very slowly progressing.
I don't know if I should add nutes, the timeline seems about right, but what if that is nutrient toxicity ?
If I had to guess I would guess a Potassium deficiency or a nitrogen excess...I doubt the latter.
Also, this is supposedly about a 60 day plant meaning it's about half done ....and about 2 inches tall.

Thanks for any and all input !

 

[Bluugrss]

Looks like nute burn to me...I'd lay off the nutes and see how the new growth responds.

 

[JaPinkman]

Well for whatever it's worth, I think that it might have been a potassium deficiency. It fit the description. I gave it a good drink with Kelp and it's looking a lot better, for now anyway. It's pepped up and looks healthier.

 

[OregonBlackBear]

I would advise against using slow release nutes with autos. It almost always ends up a bad combination.

 

[OregonBlackBear]

Those spots forming on the edge of your leaves look a lot like calcium def. Did you put any lime in your soil and are you feeding for cal/mag in your nute regimen?

 

[JaPinkman]

I would advise against using slow release nutes with autos. It almost always ends up a bad combination.

Amen brother. I've been cursing that approach (time release amendments) for about a week now. It's Fox Farm Ocean Forest with about 25% coco and as much Perlite. I wanted to try organic and really didn't know how to go about. I think that soil mix is a little hot to begin with (now I find out) so I won't be adding nutes in at the beginning until I figure out what the hell I'm doing. I think that it would have been fine if not for those amendments. Now, I'm supposed to add more?!?
Now, I'm about ready to just try and finish it out with bottled nutes, don't really know yet.
Nope OBBear, I havent' done anything for CAL Mag control. I'm outdoors in soil but I have been using crappy lights at night. I was under the impression that the cal-mag issues were a coco/LED -related problem.
Should I try adding some cal-mag?
Hey dude, thanks for the input.

 

[Bluugrss]

I've got a lady in ffof with a little added perlite.....i didn't need to add anything until about a week ago...and I'm well into flower....hard to imagine a p deficiency when yours is such a tiny plant.
Here she is now.....started bloom nutes and a bit of cal mag three waterings ago

 

[JaPinkman]

I've got a lady in ffof with a little added perlite.....i didn't need to add anything until about a week ago...and I'm well into flower....hard to imagine a p deficiency when yours is such a tiny plant.
Here she is now.....started bloom nutes and a bit of cal mag three waterings ago

Wow, nice plant. I know you didnt' grow it in that room,hehe. Was it outdoors?
Yeah, I think that it was a big mistake to put fert amendments into that soil for a first time auto grow, or ever probably. I won't be doing it again. So just to be clear it was a Potassium def maybe, not a phosphous. But your comment still makes perfect sense...why would have a K deficiency in new robust, amended soil? From the reading I've done I think that you can get that kind of thing if any number of variables go sideways and gets wonky, whether it's ph or heat, humidity, water......I'm not sure but I think it's possible? I'll see what happens going forward. I just want a healthy plant to reach the finish line. Do you think mine could be a cal-mag related issue? It looks better now after getting nothing but water and kelp but I suppose it could have just needed more water.
Anyway, thanks for commenting and I'm loving your plant, it's amazing.

 

[Bluugrss]

Wow, nice plant. I know you didnt' grow it in that room,hehe. Was it outdoors?
Yeah, I think that it was a big mistake to put fert amendments into that soil for a first time auto grow, or ever probably. I won't be doing it again. So just to be clear it was a Potassium def maybe, not a phosphous. But your comment still makes perfect sense...why would have a K deficiency in new robust, amended soil? From the reading I've done I think that you can get that kind of thing if any number of variables go sideways and gets wonky, whether it's ph or heat, humidity, water......I'm not sure but I think it's possible? I'll see what happens going forward. I just want a healthy plant to reach the finish line. Do you think mine could be a cal-mag related issue? It looks better now after getting nothing but water and kelp but I suppose it could have just needed more water.
Anyway, thanks for commenting and I'm loving your plant, it's amazing.

Thanks! Its been grown inside. I do know that fox farm ocean forest is pretty hot out of the bag.
If you have a ph issue then all sorts of issues can arise...and unfortunately alot of issues tend to look very similar. If I was you I'd get a ph probe to check your soil....then at least you'll know if your within acceptable range.

 

[Mañ'O'Green]

Wow, nice plant. I know you didnt' grow it in that room,hehe. Was it outdoors?
Yeah, I think that it was a big mistake to put fert amendments into that soil for a first time auto grow, or ever probably. I won't be doing it again. So just to be clear it was a Potassium def maybe, not a phosphous. But your comment still makes perfect sense...why would have a K deficiency in new robust, amended soil? From the reading I've done I think that you can get that kind of thing if any number of variables go sideways and gets wonky, whether it's ph or heat, humidity, water......I'm not sure but I think it's possible? I'll see what happens going forward. I just want a healthy plant to reach the finish line. Do you think mine could be a cal-mag related issue? It looks better now after getting nothing but water and kelp but I suppose it could have just needed more water.
Anyway, thanks for commenting and I'm loving your plant, it's amazing.

Have you checked the PH in the root zone? You need a quality soil probe to do that. We recommend the Accurate 8 (or the clone) or Blue Lab soil probe. Be sure to get the right one if you go Blue Lab as they make several.