Nute burn vs deficiency on tips

[leftmyth]

Hello!


As a beginner I`m bit confused what is cause of yellowing/browining of tips. Those are Short Stuff Snonwryders about 4,5 weeks old. Soil is (NPK-11:18:20). Soil PH 6,6-6,9. Watering with PH 6,5.

Well, in first two pics looks like plants has some Calcium deficiency (affected are only upper part of plant).
But what is in examples with nr.2 and nr. 3?

Are nr.2 starting phase of nr.3, like from yellow to brown, or those are separate things? I`m not sure if tips yellowing in this case is some kind first sign of deficiency or small nute burn.
At week 3 there were minor N toxicity - extra green foliage, tips curling down, but after some water without nutes it seems ok. I have watered two times with plain water and than with a bit of nutes, around 1/4 of Hesi quite weak nutes.


1.


2. 3.



overall

 

[namvet25]

You should be using cal/mag at least every other feed.Those small brown tips are nothing to worry about,its common to have a few of them,What are the numbers of your flower nutes?They need a lot of phosphorous from this point so make sure the getting enough.

 

[leftmyth]

You should be using cal/mag at least every other feed.Those small brown tips are nothing to worry about,its common to have a few of them,What are the numbers of your flower nutes?They need a lot of phosphorous from this point so make sure the getting enough.

Well, the problem in my country and region as well is that there are no additional Cal-Mag supplements around.
I tried to prevent Cal deficiency by adding only locally available supplement that is Cal+N (Cal 26,3%, N 15,5%). Quite strong, so I added only one tiny pellet (like 1/10), but after that I got N toxicity.

Flower nutes are very mild - 3:3:4. (Hesi)

But - tips, tips, tips - are those start of deficiency or minor nutes burn? I mean pictures labeled with nr. 2 and nr. 3.

 

[namvet25]

The burned tips are probably from your nitrogen toxidity.If you can't get cal/mag use some unsulfured mollasis at one tsp per gal.This contains calcium and magnieseum.

 

[Waira]

:Sharing One: Lefty- The brown tips are minor nute' burn,... (got some myself recently.. means you're right on the edge of too much!); good catch and fix, mate! The other spots on the margins and serration tips,...hmmm, problem is, at this early stage, several defc. look alike in their symptoms; Ca tends generally to start spotting in the leaf interior, mid to upper parts of the plant, but edge necrosis happens too,... given where this is happening on the plant, and the stage she's at, Ca defc. is the likely cause,... *** Can you find molasses? -not sure what it'd be called where you live, or even if it's around, but it's a decent alternative to the Ca-Mg supp's.... it has Ca, Mg and K in it; what's needed is something fast acting, and stuff like dolomite lime takes time to break down and be absorbed,... hydrated lime is a little better, but again, availability is an issue,... that other Ca stuff is CaNO3!- no wonder she got a bit cooked,...LOL! Let us know what you can find, okay?

 

[leftmyth]

thanks!


I think there is a chance to get some molasses syrup. Not very widespread, but still possible to buy. For example I found this http://www.meridianfoods.co.uk/Other-Ranges/index.asp?Dietry=Vegetarian&details=64

and this http://www.meridianfoods.co.uk/Other-Ranges/index.asp?Dietry=Organic&details=167
It could work.

Than again I have noticed hydrated lime, but I have heard that it`s way too easy to burn roots, so I decided not to risk.

 

[namvet25]

Black strap is actually better if you can get it.You shuld be able to find mollassis in almost any grocery store.

 

[leftmyth]

Thanks! I found some random molasses, not black strap, but should work fine.

So, what you suggest - teaspoon per gallon or even more in this situation?
By the way - I consider adding a pinch of Epsom salts too, but maybe molasses contain needed amount of Mg?


Shame I didn`t add dolomite lime this grow. Last one, where there were some - no signs of Ca def.

 

[leftmyth]

Oh, by the way - about phosphorous. Only thing that I found locally is something like P 22%, P2O5 52%, K 28%, K20 34% . For me it seems extra potent. Is there any another way how get extra phosphorous except gardening nutes?

 

[az2000]

Well, the problem in my country and region as well is that there are no additional Cal-Mag supplements around.

You can use Epsom Salt (available from your grocery store or pharmacy). It's for soaking a sprained ankle, etc. I'm very inexperienced, but I use 1/8 tsp per gallon as a preventative measure. 1/4 tsp when the plant needs more calcium and magnesium. It's faster acting than CalMag products. (I use CalMag too, every other watering. And silica every other. I've read silica interferes with calcium. So, that's why I began using a small amount of Epsom in every watering).

It only contains magnesium. But, i've read that magnesium makes calcium available. If you begin using Epsom salt, you might find that your calcium problem is fixed. If not, you could visit the organic section for tips on how to add calcium. They do things like use crushed egg shells dissolved in vinegar. Or, crushed calcium carbonate tablets (the ingredient in antacid tablets like Tums, or found more cheaply at a feed store (where they sell stuff to horse owners, etc.).