Can this be a nitrogen deficiency?

Im growing 2 plants, autos, ending 4th week since sprout, 4 gallon pots in soil with perlite and ewc. Watered 3 times since sprout, once a week with slight runoff. Will need to water tomorrow as its drying out faster (last water Tuesday). Gave only feeding 2 waters ago with a 25-10-10 fert diluted to quarter strength. AK was ok, the white widow slightly clawed 3 days later. Now 2 weeks later, the little claws remain, new growth has it less..but I notice the fan leaves on the white widow have started to yellow, and leaves all week have felt crispier and not so much life I guess..though plant is growing fast and after these lst pics...both colas were back up within hours. Also I notice purpling/redding on stems, temps are mid 70's for a week now, is it phosphorous deficiency? Its not part of the strain, and temps are not too cold.
My question is, should I feed them, namely the white widow even though it has slight claws but lower leaves are getting a bit yellow and they were dark green a week ago.
The last pic from today was over 12 hours ago...the big leaf in main view seems a bit more yellow now. Can it be lacking nitrogen, yet still displaying the claw from previous burn? Btw, the lights are 8 23W 6500k cfl's about 3 inches above. A fan is blowing on them.

Pictures?

Nitrogen deficiency
http://www.growweedeasy.com/nitrogen-deficiency-cannabis
"The visual symptoms of nitrogen deficiency mean that it can be relatively easy to detect in some plant species. Symptoms include poor plant growth, and leaves that are pale green or yellow because they are unable to make sufficient chlorophyll. Leaves in this state are said to be chlorotic."

Nitrogen Toxicity
http://www.growweedeasy.com/nitrogen-toxicity-cannabis
"Leaves that turn into claws often start turning yellow and dying if the nitrogen toxicity is not treated, much like a nitrogen deficiency, only the leaves will continue to get more and more clawed. Leaves eventually turn yellow or brown and fall off. You can tell if yellowing is caused by too much nitrogen because the rest of the plant will be dark green, and the yellowing leaves will turn into claws first."

I would say a slight iron deficiency. Probably from high ph.

It cant be iron deficiency as that starts with new growth first, this is the opposite it seems, and its the entire leaf slowly turning yellow rather than from the edges or spots. I notice it a bit on the ak as well but with the big fan leaf on the bottom. The upper part is darker green. I just wasn't sure if the white widow can be lacking nitrogen at the same time as displaying the claw from a previous overfeed. I assumed as it used up the excess nitrogen, the claw would go away. Im not sure what to do, I probably will only water them. If the leaves turn yellow i'll cut them off.

Only feed them water for the next week and update us with some pics.

I don't think the white widow will make it, i'll keep the ak and see how that goes. Noticed some yellowing on an upper leaf on the widow and its in the centre of the leaf, that's probably a separate issue. Hopefully the ak gets me an ounce Thx for te help!

Blitz35 said:

I don't think the white widow will make it, i'll keep the ak and see how that goes. Noticed some yellowing on an upper leaf on the widow and its in the centre of the leaf, that's probably a separate issue. Hopefully the ak gets me an ounce Thx for te help!

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First cannabis is extremely resilient and the issue is not that serious no reason why the WW won't survive and produce. I read your other thread and I see 2 issues. 1) do you still have mirrors around the plants? If so, you very likely also have light bleaching in addition to the minor N toxicity. 2) While normally I would encourage a new grower to read and learn. But, you my friend are suffering from information overload and are way over-complicating this. It is a plant and wants to grow. if the plant does not survive...IMHO you will have 'loved it to death'. Calm down, chillax and let Mother Ganja do what she does best.

The mirrors are long gone, I thought its evident from the pics..the plants are surrounded by mylar. Yes, you're absolutely right..it is information overload and I know that its getting worse..i look at them daily many times and they, especially the widow, is not the same as over a week ago..leaves have little life it seems..definitely not like a plant should look. The white widow's leaves were dark green a week ago..now paling..same with the ak..I notice bottom is more yellow..all I know is that's not normal just when flowering is about to start. being I have no way to know what it is..I know its just going to be getting worse daily. I was hoping I can go through the grow with adding water only, its why I got auto's..but that's not the case with this one. Now that its yellowing..its a never-ending guessing game as to what it may be..being that its an auto..i don't have time to test each of the myriad of things it may be as the plant will continue to flower regardless and in the end I don't want to do all this so I can get 5 grams off her lol. Easier to cut my losses and put my energy into the other plant which maybe can get me an ounce if im lucky

The pics are all of one plant btw, and there was definitely toxicity as the upper part of the plant has clawing from 2 weeks ago.

Dude...I really don't want to pee on your parade...I very seriously doubt you are going to yield even close to an ounce from either or even both of those plants dry weight. Cannabis loses 75% or more of it's weight in drying and curing.

Also autos do not respond well to LST or any bending training. The problem is that the life cycle is so short...the plant spends a lot of time and energy recovering from shock and injury instead of focusing on reproduction.

See that's another curve ball..I have read dozens and dozens of articles/threads/advice saying lst is a must for auto's to get a higher yield..its the only form of training an auto can take. I've seen countless videos showing the results. Now I hear not to do it at all. I learnt that as many people you converse with over this topic..that's how many different answers you wil lget to the same question lol. If I don't train them..i will have one main cola going up and that's it! Nothing else can come through due to being hidden under the top. This is actually the first time I ever heard not to lst an auto!

The ak has 13 tops I count that will come up along the main cola. The white widow is less. If I can get 2 grams per top..I have my ounce.

Im not counting the white widow..but the ak should get my ounce, would be surprised if each tops produce only a gram.

$bkbbudz$ said:

Dude...I really don't want to pee on your parade...I very seriously doubt you are going to yield even close to an ounce from either or even both of those plants dry weight. Cannabis loses 75% or more of it's weight in drying and curing.

Also autos do not respond well to LST or any bending training. The problem is that the life cycle is so short...the plant spends a lot of time and energy recovering from shock and injury instead of focusing on reproduction.

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Sorry bkb but saying that autos don't respond well to LST is pretty ridiculous. They Do respond well to LST in particular and to fims and topping to a lesser extent. I haven't had good luck with supercropping experiments but that's a bit more traumatic to the plant and probably takes too much recovery time.

There are literally tons of examples of autos that have responded well to LST all over this forum and elsewhere.

Resinhound said:

Sorry bkb but saying that autos don't respond well to LST is pretty ridiculous. They Do respond well to LST in particular and to fims and topping to a lesser extent. I haven't had good luck with supercropping experiments but that's a bit more traumatic to the plant and probably takes too much recovery time.

There are literally tons of examples of autos that have responded well to LST all over this forum and elsewhere.

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Hey...I am no troll and show enough humility to admit that I may have been in error. I have never grown an auto so I have little experience. I am just going by what I know (or thought I knew) about autos and training. You have more experience than I in auto cultivation so I am sure you must know what you are talking about. I was pretty sure of the super-cropping thing though and still am.

Thanks for teaching an old dog new tricks resin!

Auto's are some finicky beatchs from what I read. Auto's are like bell bottoms to me, here today gone tomorrow and back next week revamped.

Blitz35 said:

.but the ak should get my ounce

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I would be pissed if I shot for an oz. Don't even cover the power bill to run. I could of bought that zip cheaper. Im random right now and hope it works out for you and good luck.

Blitz35 said:

See that's another curve ball..I have read dozens and dozens of articles/threads/advice saying lst is a must for auto's to get a higher yield..its the only form of training an auto can take. I've seen countless videos showing the results. Now I hear not to do it at all. I learnt that as many people you converse with over this topic..that's how many different answers you wil lget to the same question lol. If I don't train them..i will have one main cola going up and that's it! Nothing else can come through due to being hidden under the top. This is actually the first time I ever heard not to lst an auto!

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I was actually incorrect on that issue as I realized after Resin Hound corrected my thinking.

Blitz35 said:

The ak has 13 tops I count that will come up along the main cola. The white widow is less. If I can get 2 grams per top..I have my ounce.

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Good luck with that. Math is math my friend and numbers don't lie. With 13 tops at 2 gm per top WET WEIGHT that is 26 gm. Multiply that by .75 you get 19.5 which is the minimum amount of weight you will lose in drying and curing. That leaves you with roughly a 1/4 ounce. If you add an additional 7 Gm dry weight for the main cola you are still at 1/2 ounce.

I routinely net 2-4 ounces on my autos dry weight, I've had a few outliers weigh in as much as 6oz.Pot size and incremental harvests are the main factors contributing to a larger final yield in my experience. Ive had a sour bubbly net 2oz in a 1 gallon hempy.

Math is math and numbers don't lie??? lol..what are you talking about? I said if I can get 2 grams per top I have my ounce..I never specified wet weight. Anyway, thanks for your input and the math lesson lol. My colleagues would get a kick out of someone telling me about math! lol At least you brought a smile to my face! Thx!