cal or Mg def?

[joe fresh]

these are not my plants, they are pics from the net, but one of my strains gets this and im just wondering what your guys opinions are based on pics alone.

my guess was calcium, but i see so many pics of cal and mg def getting mixed up i find these hard to differ imo, so any input on what you think is causing this would be cool...

 

[SeaMaiden]

2nd pic is definitely Ca deficiency, the others may be showing an issue with potassium. I see nothing showing a Mg deficiency.

 

[Simon Templar]

Hello,

In my opinion all of the pictures show problems with potasium (K). The first one looks more like a potasium deficiency and the others are clearly burnt - too much potasium...

I have also had potasium deficiency problems in my grow very recently, so my info is really up to date. In my case, it begun with spots and dots on the leafs like on the first picture, but some of the leafs got also purplish hues on the bottom parts! I added some Hesi PK (light dose) and the problem was solved on 2 plants but the third got burnt and looked like those on the three last pictures.

I hope you're get on with your problems very soon!

Simon

 

[Duplicate]

I've tried to figure this out before as well. This is the only image I've been able to find that compares the two.

I'm not sure how accurate it is, but it's a start.
Also reading some descriptions might help as well. I think I remember reading that there is some stretch associated with calcium deficiency.

 

[joe fresh]

wellwhat i was seeing on some of my plants is they get a bit pale and start in the middle of plant on older leaves looks like pic #2, then if i dont correct it it progresses to what the other pics look like....

which is why i was thinking calcium, but on the thread i pulled these pics from the guy was asking Ca or Mg def, and i see this alot on the net, and never really having a real Ca def or Mg def that i could identify with, i was wanting to save a few of these pics with a lebel on them for future referance but dont want to mislabel them


the only problem i see is K Ca and Mg all get locked out by sodium(high salt content), so if these 3 arise at the same time it couls be linked to high salts in the soil. but my runoff ph-ec is 6.2ph 1.6ec so my numbers are good so i think the problem im getting is from mixing too much RO water with the tap(tap is 170ppm) and therefore not enough calcium...plus im feeding at 1.6-1.8 EC every 2-3 irrigations so im thinking it is Ca def on my plants....


well thx for the help, any other input is welcome, otherwise i will label these as Calcium def...thx

 

[grandmaster B]

the experience i have tells me its simply lockout. Flush your plants and start your feeding again as normal. Good Luck!

 

[moonymonkey]

looks lik cal to me,wen i see it,was cuz i dint water my 5 gallon self watering box soon enough..got the shities..u know usally u gotta change ur food.tomatoe plants get this all the time,since cal is greatly afected by moister to little to muck=def..alot peeps get this ,cuz its usally a watering issue....moon/thechimp

 

[Choas]

Too much nutrients (complete NPK), causing a knockout of trace elements like MG or Ca.

Symptoms are the upcurling leaftips (too much K, pic 3&4), the daaarkgreen color of the hole leafe (too much N,pic 1,2,3&4) and the Mg- and little Ca-deficiency (pic 2 and 1).

Greetz from Germany^^

 

[joe fresh]

so here are some leaves from my plants, its only happening on one strain, sour cream( sour D x g13 haze)

so like i was saying, im in the process of collecting photos and doing a sick plant diagnosis like stitches, but im trying to do one more updated on the photos, so am trying to name the def of each pic...

here are some pics from my plants that i found similar to the ones i posted above that i found on the net....again my guess was Calcium deficiency...


Symptom start

symptom progression

symptom middle stages

late stage

 

[SeaMaiden]

I watched something very similar happen to last year's OD grow in my new beds. What I see there looks just like it, a Ca shortage progressing into a K problem. I found brief relief using Sul-Po-Mag and Cal-Phos, but since the Ca wasn't laid down sufficiently early on, I was chasing my tail. I was able to stop the K issues pretty easily, but not the Ca.

Your first pix absolutely confirm Ca deficiency to me.

 

[BasementBreeder]

Joe

What exactly are you feeding her? Also, how are your temps and humidity?

edit: This is on old growth, correct?

 

[joe fresh]

thx seamaiden, its what i was thinking but its always nice to be reconfirmed before any action is taken...and at the same time i can label these pics and add them to my leaf pest issues file....its looking pretty good just missing some pics to complete it

 

[joe fresh]

Joe

What exactly are you feeding her? Also, how are your temps and humidity?

edit: This is on old growth, correct?

17 days ago they were all flushed and then transplanted, then put in 12/12...since the flush they only got 3 feedings at 850 ppm(1.7 EC), once a week they got fed....

so i know its a deficiency and not a salt build up or an antagonism...

 

[BasementBreeder]

I actually meant what brand of nutes you are using(as well as the rate you use them at). I'd prefer the elemental NPK but can figure that out with the former.

 

[joe fresh]

H&G soil(about 3-1-5.8), @ 1.8 EC every second to 3rd watering(about once every 6-10 days depending how the watering works out and how the plants drink....

 

[moses wellfleet]

so here are some leaves from my plants, its only happening on one strain, sour cream( sour D x g13 haze)

so like i was saying, im in the process of collecting photos and doing a sick plant diagnosis like stitches, but im trying to do one more updated on the photos, so am trying to name the def of each pic...

here are some pics from my plants that i found similar to the ones i posted above that i found on the net....again my guess was Calcium deficiency...


Symptom start
View Image
View Image




symptom progression
View Image
View Image





symptom middle stages
View Image
View Image






late stage
View Image
View Image

I have observed these exact same symptoms for some months now, and I am starting to suspect Pythium, Fusarium or another fungal disease... Has anybody had similar experiences?

 

[Catatafish]

I have the exact issue in pics 2-4. So much so that if i didnt know any better i would say that is my plant in the pic. Same leaf structure, color, and damage.

Only have it on 1 plant in flowering. Its an "Em-Dog" (ogk x chem4), short stature pheno so im suspecting more of the ogk leaning which i thought is supposed to be finicky about nutes, she's been that way since seedling. The other two phenos dont exhibit this problem, nor do anything else in flower now. 1st time flowering this cut.

Interested in outcome.....but i guess the thread is old so.....

 

[Catatafish]

Oh... i did start off using silica at the beginning of flowering but was mixing it in after base nutes which im guessing is a no-no due to it locking stuff out. I since quit using it and problem remains. It appeared i was getting cal issues on some other stuff before i stopped the silica, but everything else has since stopped having issues except this cut.

 

[vapor]

looks like the plants in question got hit a little to hot in terms of ferts at some point in the past. look like you have a calcium def going on with mag a bit too. Seems the calcium is more so. ppm rootzone/ph.

 

[Catatafish]

Kinda what im thinking too. Cal def early from silica screw ups... then too much nutes afterwards for this particular chick. I have other symptoms of over nuted such as claws and super dark green. Extra leafy to boot.