Nitrogen def? Plz Help...

[m3and3an]

My plants seem to be having problems. i cant tell if its (N) (K) or a calcium def, overfert is even a probabillity. Please help diagnose my poor plants.

[Vez]

That looks like multiple deficiencies. This could mean your PH is off or your PPM is too high. Check the PH of your soil and if it's fine check the PPM of your nute solution and make sure it's not super high. With plants that size they dont need more than 300ppm/H2O.

Also, check if you're using hardwater... A lot of my buddies have tried growing only to find their plants dying every time. We checked the PPM of his water and it was almost 300 without additives! High amounts of calcium and chlorine will kill a perfect plant in weeks.

[teflon]

You've got to give us some more info bro.

What are you fertilizing with?

[Help_Needed]

Originally Posted by Vez

That looks like multiple deficiencies. This could mean your PH is off or your PPM is too high.

Agreed. Multiple deficiencies almost always indicates a pH problem (especially in soil). You need to do a pH run-off test. Search the forums. There are instructions on how to do it all over the place.

Once you know where your pH is, we'll be able to give you an idea of how to fix it.

[harvester]

Couldn't it just be a simple matter of his plant needing more nutes?

In fact I find it a little odd that Ph is diagnosed so much as a problem in soil grows on these boards.

[harvester]

Trouble is with most deficiencies is that if you are deficient in one nutrient you are most likely deficient in all three and more essential nutes.

Now this can be caused by a number of different things... the first one I always think of is undernute. So many growers are told to use nutes with caution, when instead they should be told to buy a truncheon or ec/ppm meter.

If you're not an organic grower then adding nutes without one is just asking for trouble... and also when the trouble happens it is very hard to diagnose where you've gone wrong.

[Help_Needed]

Originally Posted by harvester

Couldn't it just be a simple matter of his plant needing more nutes?

In fact I find it a little odd that Ph is diagnosed so much as a problem in soil grows on these boards.

Could it possibly be that's because our experience has shown that pH problems are somewhat common, even in soil grows? And that same experience has shown that when multiple deficiencies occur it's frequently pH related, so that's one of the first things to look for?

[Help_Needed]

[quote=harvester;2433319]Trouble is with most deficiencies is that if you are deficient in one nutrient you are most likely deficient in all three and more essential nutes.[./quote]

Sorry, this is flat out wrong. It assumes, incorrectly, that plants consume all of their nutes at the same rate, and they don't.

Now this can be caused by a number of different things... the first one I always think of is undernute. So many growers are told to use nutes with caution, when instead they should be told to buy a truncheon or ec/ppm meter.

Again, experience has shown that new growers' most frequent mistake is overfeeding, usually because they're using cheap potting soil with time-release fertilizer, and then they get excited when the see how fast the plant is growing and add even MORE nutes on top of what's already in soil.

[SmknVTEC]

Looks like over fert to me. We definately need soil pH run-off pH, nutrient type, how much given and when last given etc. What type of soil as well?

[harvester]

Sorry, this is flat out wrong. It assumes, incorrectly, that plants consume all of their nutes at the same rate, and they don't.

Which is why we don't feed our plants similar ratios of different nutes. In fact I don't know of any vegging nutes where the N is as high as the P. OBVIOUSLY nute makers are aware that plants don't uptake nutes in similar quantities. A veg/flower nute is designed with the right ratios that a normal healthy plant should uptake during either stage of development.

Again, experience has shown that new growers' most frequent mistake is overfeeding, usually because they're using cheap potting soil with time-release fertilizer, and then they get excited when the see how fast the plant is growing and add even MORE nutes on top of what's already in soil.

Dear oh dear, you really have got a bug up your ass haven't you. Well I'll tell you that my experience (of growing forums) has shown me that people are advised to use caution with their nutes, 1/4 this and half that. What I'm pointing out is that this is bad advice, and that they should be advised to buy an ec/ppm meter instead. This also stops the vast amount of undernuting that newbies go through when they listen to the 'caution advice' dished out daily on forums like this all over the web.

Undernute is also too hard to call just by looking at a pic... what appears to be a nitrogen def could easily be a toxicity problem that has led to the none uptake of nutes, and this has little to do with pH.

Experience is something you are lacking in, it is clear to me that you are merely repeating what you've heard before and are not actually going by your own experiences.

[GigZ-16]

Play nice, children.



I'd say check pH tho...

[AugustWest]

Originally Posted by harvester

Which is why we don't feed our plants similar ratios of different nutes. In fact I don't know of any vegging nutes where the N is as high as the P. OBVIOUSLY nute makers are aware that plants don't uptake nutes in similar quantities. A veg/flower nute is designed with the right ratios that a normal healthy plant should uptake during either stage of development.





Dear oh dear, you really have got a bug up your ass haven't you. Well I'll tell you that my experience (of growing forums) has shown me that people are advised to use caution with their nutes, 1/4 this and half that. What I'm pointing out is that this is bad advice, and that they should be advised to buy an ec/ppm meter instead. This also stops the vast amount of undernuting that newbies go through when they listen to the 'caution advice' dished out daily on forums like this all over the web.

Undernute is also too hard to call just by looking at a pic... what appears to be a nitrogen def could easily be a toxicity problem that has led to the none uptake of nutes, and this has little to do with pH.

Experience is something you are lacking in, it is clear to me that you are merely repeating what you've heard before and are not actually going by your own experiences.

how could you possibly diagnose a soil overfert or deficiency or lock-out without knowing what the PH of the soil is?
in other words you simply look at his yellow leaves and tell him to add some nitrogen. What if the PH of his soil is 5.5? How would adding nitrogen help his yellow leaves?
BTW you mention giving 1/2 strength nutes... sometimes that's way too much depending on the manufacturer. (which is probably why you got all those spots on your leaves in your grow journal)

peace,
AW

[SmknVTEC]

Yeah we need pH, it looks like pH could be involved. We need run-off pH too. But looks like the thread starter has mysteriously gone MIA.

[harvester]

Originally Posted by AugustWest

how could you possibly diagnose a soil overfert or deficiency or lock-out without knowing what the PH of the soil is?
in other words you simply look at his yellow leaves and tell him to add some nitrogen. What if the PH of his soil is 5.5? How would adding nitrogen help his yellow leaves?
BTW you mention giving 1/2 strength nutes... sometimes that's way too much depending on the manufacturer. (which is probably why you got all those spots on your leaves in your grow journal)

peace,
AW

Yet someone else that doesn't read whole sentences... if the pH of his soil is 5.5 then he needs to raise the pH to 6.5 adding nitrogen wouldn't do this, if anything it would take the pH down further.

Either way pH is not the point... whenever you add a feed to the soil (saturate it) the soil becomes the pH of the feed you put in. If you use an EC/PPM meter (which has pretty much been my point the whole way through) then this stops THE NEED to feed half strength nutes or quarter strength or whatever else. Indeed you can give your plants exact quantities of the nutes they need to provide you with a hefty yield. Esp once the seed grow is out of the way and you're growing clones. This is the point.

Also in regards to the spots on my leaves, I did mention these right at the start of my journal. The plants have got thrips... hence the reason I quit growing over x-mas to try and eradicate them. Soon as I started growing again, they were back. You'd know that though if you read my journal rather than simply looking for mistakes.

peace? lol

[AugustWest]

so your saying the dude wh started the thread should add nutes just by looking at the photo and with out knowing what his PH is? LOL
sorry but anyone who's plants look like this shouyldn't be telling people to disregard soil PH.
http://www.drskunk.com/skunkskool/index.php?showtopic=4

see those crispy leaves you got all over the place? It's because you have tons of salt buildup in your dirt.
Why? Because you have no idea what the PH is.

you MUST know what the ph of your dirt is before you can just come out and say "add nutes" again look at your own grow journal that's proof right there.

peace and good luck.

Originally Posted by harvester

Couldn't it just be a simple matter of his plant needing more nutes?

In fact I find it a little odd that Ph is diagnosed so much as a problem in soil grows on these boards.

dude that says it all right there..
the dudes plants if anything are overfed.. so telling him to add nutes will only make things worse. Again can't really tell unless you know the PH.
and it's not just this board it's any board you go to and ask for a diagnosis.. no one will even answer your question without knowing what the PH is.
go to ICmag and ask for help.. the 1st thing anyone will ask is what's your PH.. theres a reason they ask this question.