Is this a nutrient deficiency?

Baked Jesus

Baked Jesus

Well-Known Member
Hey all, I'm just wondering why the bottom leaves are yellowing? The water's PH is around 7. I haven't started feeding it yet as it's only a few weeks old. But I'm not sure what this is?

Other than the slight yellowing of the lower leaves, does this baby look ok?
 

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Baked Jesus

Baked Jesus

Well-Known Member
Thanks a lot KP. I was worried it might be something else. I'll start feeding it next water, which should be tomorrow. Thanks again.
 
babygro

babygro

Well-Known Member
Baked Jesus said:
Hey all, I'm just wondering why the bottom leaves are yellowing? The water's PH is around 7. I haven't started feeding it yet as it's only a few weeks old. But I'm not sure what this is?
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I'm not convinced in my mind it's Nitrogen deficiency.

It's unusual to get a N deficiency after only 2 weeks of growth, and it will only happen if your soil isn't very rich in it and is of a poor quality. The pots you have your plants in look a decent size too, which makes me wonder how the plant could have run out of Nitrogen so quickly. It's true these plants use plenty of N in early growth, but not enough to deplete that container of it in 2 weeks.

The more likely problem is Magnesium, which can look very similar to Nitrogen deficiency in the early stages. Nitrogen deficient plants' leaves usually yellow all over and go a slightly darker yellow, Mg deficient plants' leaves tend to go pale yellow at the tips and tip end half of the leaf then start to turn brown.

It's important for you to correctly identify which of these two deficiencies you have because the cure for each of them is different.

You can do more harm than good trying to correct a deficiency which has been incorrectly diagnosed. You need to find out the cause of the problem and fix it.
 
V

VirginHarvester

Well-Known Member
Not to hijack but a quick question along these lines.

My plants seem healthy overall and are developing nicely. Everything looks great all the way up with large, thick, lush leaves and new growth. But at the bottom the leaves turn yellow and start to shrivel- It's only the first rung or two of leaves and the branches never really grew out anyway. Is this all normal as the plant is putting it's energy towards the top, new growth?
 
Baked Jesus

Baked Jesus

Well-Known Member
babygro said:
Mg deficient plants' leaves tend to go pale yellow at the tips and tip end half of the leaf then start to turn brown.
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From that it sounds as if a Mg deficiency is the problem as that's exactly what's happened to my other plants and starting to on this one.

What can I do to fix the Mg deficiency?
 
babygro

babygro

Well-Known Member
Baked Jesus said:
From that it sounds as if a Mg deficiency is the problem as that's exactly what's happened to my other plants and starting to on this one.

What can I do to fix the Mg deficiency?
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Hiya Baked Jesus

You have two options really - fix the cause or remedy the problem.

Finding the cause isn't always easy, but I'll bet it's your irrigation waters calcium content that's locking out the Mg. That's the usual problem this early in vegetative growth. The only real long term solution is to use RO water.

The remedy is bascially to either/or water with 1 teaspoon of epsom salts (Magnesium Sulphate) per 4 litres or 1 gallon of water, or apply a foliar spray in the same proportions.

Foliar spraying is probably the best option in my opinion as the Magnesium is easily assimilated via the leaves and avoids the lockout going on in the soil, foliar spraying also shows quicker results than root feeding.

Just make sure you foliar feed the plants after lights out.
 
videoman40

videoman40

Well-Known Member
Check your PH dude, mg will lock out if your in the lower ph ranges.

If it is Mg def, you will notice the new leaves curling up on the edges as well as chlorosis and necrosis. I had Mg def awhile back and it was easily corrected with two feedings of 1 tbsp epsom per gallon of water. (I added the epsom to the water without other nutes during a 'water only' feeding.)
Peace
 
videoman40

videoman40

Well-Known Member
It sounds like hes checking the water coming out of the faucet, he should be checking his runoff. That was why.
Peace
 
babygro

babygro

Well-Known Member
videoman40 said:
It sounds like hes checking the water coming out of the faucet, he should be checking his runoff. That was why.
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He shouldn't be checking the run off, he should be checking his irrigation water - that's what will change the soil ph over time. In any case, as I've said a hundred times or more now, compost is self buffering and it'll take an awful lot of either alkaline water or acidic water to make any changes to that soil ph and at 7.0, its isn't going to happen or change very quickly at all.

Videoman, please don't start over-complicating things, there's no need to start messing about with water ph or soil run off ph.

His problem is NOT an out of whack ph.
 
videoman40

videoman40

Well-Known Member
First off, my reply was not directed towards you, and it was merely adding to the info that you already supplied.

However, he should be checking his run off as this is a more realistic way to check your actual ph, rather than checking just the water. The waters ph out of the faucet has no revelance compared to the runoff.
Peace
 
Baked Jesus

Baked Jesus

Well-Known Member
Hey thanks a lot guys, I'll be getting some epsom soon to try and fix this problem.

Also, how would I check my 'run off' PH?
 
babygro

babygro

Well-Known Member
videoman40 said:
First off, my reply was not directed towards you, and it was merely adding to the info that you already supplied.

However, he should be checking his run off as this is a more realistic way to check your actual ph, rather than checking just the water. The waters ph out of the faucet has no revelance compared to the runoff.
Peace
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I don't agree and you know why I don't agree as well.

Thousands of people (myself included) do not check either irrigation water or soil run off water for ph when growing in soil and we all seem to manage to produce pretty healthy plants and good harvests.

Take a look in my grow Journal Videoman, my plants are now over 8 weeks old, have had only 0.5ml of Biobizz grow in that time, have never had the water ph tested and are perfectly healthy plants. Why aren't they dying because I haven't checked my irrigation water ph or soil run off ph?

The reason you don't need to be concerned with ph in soil is because as I continue to keep saying COMPOST IS PH SELF BUFFERING. Trying to change the ph of water in soil grows using commercial shop bought ph up and down can cause more problems than it solves in soil and the acids in these products can kill beneficial soil microbes and beneficial bacteria.

You people are obsessed with ph and in soil it's simply not necessary.

Soil is not hydro.

By trying to 'help' you're making things way more complicated than they need to be.
 
videoman40

videoman40

Well-Known Member
Dude, I'll reply to you rather than to baby, my point is, that there is no use in attacking a defiency, if it is caused by a lockout.

This is merely an attempt to keep you looking at the very basics of growing, before jumping into a solution that may not work, if there is a ph problem. It surely is a cheap and easy thing to check on too.

I'm actually kinda wondering if those cans could have altered the ph in some way, cause of the metal(s) leaching into the soil.

There is no real reason to not check your ph. Knowing where your ph lies allows you to see what nutes are available to it. Too much one way or another, and you'll have a lockout.

Simply water your plant, and collect some of the runoff that comes out the bottom, test this water....and your all set.

If the ph is on the money, or not, you can proceed from here with confidence.
Peace

Baked Jesus said:
Hey thanks a lot guys, I'll be getting some epsom soon to try and fix this problem.

Also, how would I check my 'run off' PH?
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Baked Jesus

Baked Jesus

Well-Known Member
No harm in checking, right? I'll be sure to check this next time I water the babies.

Thanks for the advice guys, I appreciate it.
 
K

kindprincess

Well-Known Member
hate to interupt, and beleive me, i'm not here to argue, i just would like to say that i still think it's a nitrogen deff, and i do not think it's a mag deff (which usually occurs in flower when growing in soil). i could be wrong, but this is what i think.

here is a picture of a mag deff, and a link to icmag's infirmary thread. lots of pix for cross refference.

the defficiecy i see is starting at the bottom of the plant, and affecting the leaves from the outside going in. mag def's start within the leaves, whilst the outer edges stay pretty green (at first, anyway).

babygro, vman, i respect and love you both. please do calm down, we all have common interests, and should be supporting each other instead of fighting.

love, kp

International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!
 

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