Major Magnesium Deficiency in Organic Soil Need HELP! PLS!

[knna]

I agree most of what toodles wrote.

First off, its not a mg deff, as the third picture before this post shows pretty well: intervenal chlorosis is similar to that due to Mg deff, but it shows mainly at top of the plant. Mg deff shows first at medium low areas and goes advancing to the top. At the time it reaches top leaves, its asevere deff, and your plants arnt showing that.

The fact that top leaves are the most affected points towards an inmobile element lacking. Causing intervenal chlorosis, there are two: Fe (iron) and Zn (zinc). One of both is what your plants are missing. In not chelated form, they are almost blocked at high phs (at 7 their uptake is minimun). So probably your soil has a ph high enough to near block the uptake of both. Excess Ca and/or Mg may lead to micros uptake problems too (again, for no chelated), so you may agravated the problem by adding e salts and calmg.

Add a supplement of chelated micros and all will go way better pretty fast. Foliar feed of Zn and Fe is effective too (and you will need a very little amount to fix the problem).

Peace, knna

 

[richyrich]

I have to say I heard that same statement knna and it wasn't the case. I heard all kinds of things to the point I didn't think anybody knew what they were talking about.

In soil and having problems always flush but make sure your tap is dechlorinated. Add a tea for some microbes and sit back and observe. If things don't pick up then you have to start trying one remedy at a time. But, first tell us your ph runoff. In organics they say ph is not important, but I still say it is. Some just have lucky tap and it just works out for them. I dont take any chances so I adjust with all natural earth juice ph up. It will not hurt anything to just take an extra precaution.

And lastly, take care of your microherd because without them your plants will go hungry.

Edit: I just seen your post. Your tap ppm of 85 is too low in my opinion. I would say you are having the same problem I was. I don't care how much dolomite you used it breaks down to slow in my opinion.

 

[knna]

I have to say I heard that same statement knna and it wasn't the case.

What statement exactly?

That its a Zn and/or Fe deff?

 

[richyrich]

Mg deff shows first at medium low areas and goes advancing to the top.

This does not always happen, IME.

 

[knna]

Mg is a highly mobile element wich if is needed to support new growth, its taken from low leaves. As simple as that. If the intervenal chlorosis shows first at top leaves, it cant be mg deff. Yep, ive seen many times idenfify a Zn or Fe deff as Mg deff because they shows pretty similar, but the key distinguising between them is looking where they show.

If a diagnostic is right or not depends of if the treatment for it works or not.

In this case its obvious that the treatment applied against Mg deff didnt work, simply because it isnt a Mg deff.

I have a decent experience about this, and ive never found a Mg deff showing on top leaves first. But what ive seen many times its being diagnostiqued the wrong way.

 

[richyrich]

All of this started in the top of the plant. After I did what I did they turned out like this.




My proof is in the pudding. I'm not saying that what you said does not happen. Actually, it is the usual way the deficiency will come about. That is an easy find just by reading in the infirmary. I just wanted to state that it is not always the case and if I would of followed the ten different suggestions I received when I asked for help I would still be chasing my tail because many said it was not a magnesium deficiency because it did not follow the common signs. That is it. Not saying you are wrong. Just that it can deviate from the common way.

I guess we can chalk it up to different strains. I grow bubba kush and she is a real magnesium hog.

 

[Johnny Rotten]

Magnesium def can show on new growth as well as old growth IMO.....new growth twisting or "praying" can be a sigh of mag def. as well as interveinal chlorosis. Iron def will show as the new growth being yellow and stunted.
Here's a plant starting to shows signs of mag deficiency.....from overwatering(rain)

 

[knna]

I must admit that it seems what you say. I would like to know more the process and the treatment. Im very interested when i discover something new. Until this moment, ive only found one case of mbile/inmobile elements showing the deff on the "wrong" part of the plant, and its Sulfur deff showing at bottom, although i think its related to how S and N are interrelated in plant's tissue.

Do you have the link to the thread where it was discussed? Im pretty interested on this topic and would like to talk about it more deeply, without hijacking fuhshietfu's thread (although it may be very related; but i dont like to do it without explicit allowing).

"Never go to bed without learning something new"

 

[Pirate138]

Maybe so. My experience with weed is limited.
Toodles
Rookie Grower

So why are you then flaming me sayin i cant advice cause i have a deficiency? Im getting flamed by someone who is a rookie and doesnt have much experience with cannabis?

 

[Johnny Rotten]

Never feed every watering, only every other. Molasses is a waste. Also PBP makes a bloom for soil. I wouldnt waste time with seeds, let the pros make em.

Hmmmm......ya surely got one right.....no comment on the rest.

 

[DIGITALHIPPY]

epsom salts suck u need some sensi-cal
MJ=MAG WHORE.

 

[Johnny Rotten]

Ugh....AN....my stomach hurts a little now. are you a rep or something?

 

[knna]

richyrich, your argument that it was an mg deff due it was fixed by flushing and treating with sensical dont prove it at all, but the inverse. AN sensi cal is a formula of Ca, Mg and micros, especially Mn and Zn and Fe. So its adecuate to fight against a Zn or Fe deff, wich is what a top intervenal chlorosis point to.

 

[B.C.]

Well...

Well...

That pic was actually taken a couple weeks ago (3weeks)my plants are now just about hitting full 5 weeks of flowering.

The buds are coming along nicely and the mg problem has progress some as well.



I will update this thread in a few weeks.

Yer gonna think I'm crazy, bare with me. I think yer light is too close. Yall can look at the first picture, you can see where the hottest part of the light was shining on them. The light is 6 inches from the tops with a fan blowing on them in 80-85 degree temps. This will bleach the clorophyll from margin of the leaves but leave the veins green. I would raise the light and have the fan either blowin up or straight across the bottom of the light, not on the plants tho. When it's blowin on the plants it carries the heat with it and yer plants will suffer. If you have a mag deficiencty the buds aren't gonna grow much and the plant will go down hill fast! Instead, "the buds coming along nicely". You wouldn't think there would be problem with a 400w ina cooltube bein too close, but that's what it looks like ta me. My 2 cents. PLEASE! Post more pics later so others may learn from this, no matter who's right or wrong. Good luck man! Take care...BC

 

[toodles]

I deleted that last post of mine. It was on wrong thread.

Sorry

Toodles

 

[richyrich]

richyrich, your argument that it was an mg deff due it was fixed by flushing and treating with sensical dont prove it at all, but the inverse. AN sensi cal is a formula of Ca, Mg and micros, especially Mn and Zn and Fe. So its adecuate to fight against a Zn or Fe deff, wich is what a top intervenal chlorosis point to.

Okay....