Guide to Nutrient Deficiency or Toxicity

[ANC]

Those things are locked out... I would just flush them a bit with water, then feed them whatever you were feeding in week 3 of flower, without all the extras.
Once you burn the roots like that, you are going to coast to the end. There is not really enough time left to turn things around.

 

[KonopCh]

Those things are locked out... I would just flush them a bit with water, then feed them whatever you were feeding in week 3 of flower, without all the extras.
Once you burn the roots like that, you are going to coast to the end. There is not really enough time left to turn things around.

Are you sure about that? My total EC is maximum 1.8.
Also I bottom fed, so it's smart to flush from above?

 

[JSheeze]

Hey what's up, I was hoping I could get some opinions on what I got going on.

Day 35 from flip, possible K deficiency?...
View attachment 4269501 View attachment 4269500

Entire canopy...
View attachment 4269503



DWC

Tap water 265ppm. I fill 5gal bucket with tap water and add 1 scoop from small end of 'MaxiBloom' (1 tsp I think) scoop provided with bag. Then add 6ml of Liquid KoolBloom. Then add 1ml of Floralicious+. Then add 15ml Root Farm pH down to 5.78 (start ~7.6). Then finish with a little hydroguard (Southern AG d747).

565ppm total

5.75 pH but drifts to 6.05 and settles around there.

After I took these pics I pumped buckets dry. Pumped 5gal fresh (265ppm) pH-ed water back in (9gal capacity) to rinse. Then pumped it backed out. Then pumped 9gal 565ppm nutrient regimen back in.

Are they just hungry? I backed the light off a bit because its centered around what could be a hot-spot but seems other spots should be affected considering their close proximity as well, but they seem fine, so it makes me think its possibly nutrient related.

EDIT: pretty sure city water comes from diverted natural (crystal clear) mountain creek, thus the high mineral count...

Tap water...

 

[Go go n chill]

Ya man just coast till the finish

 

[Roger A. Shrubber]

Are you sure about that? My total EC is maximum 1.8.
Also I bottom fed, so it's smart to flush from above?

it's not the total ec, it's what makes up the ec. you're adding mkp....and using base nutes...you probably have way too much P....which has a tendency to burn leaf tips and edges when over applied...you don't get burnt edges from under feeding

 

[KonopCh]

it's not the total ec, it's what makes up the ec. you're adding mkp....and using base nutes...you probably have way too much P....which has a tendency to burn leaf tips and edges when over applied...you don't get burnt edges from under feeding

Cannabis loves P. And at 0.2-0.3 g/L I doubt it's excess. That's 0.1-0.2 EC. I was using the same fed in the past and had no troubles. That's why I doubt.
Also P excess shows as Ca/Fe/Zn deficiency.

I don't like to guess what is wrong with my plants, so I am looking for someone who spent 2min looking at my picture and read whole text and they think about it. And then reply. No ofense.

 

[Roger A. Shrubber]

you're late in flower in coco, all the "deficits" in the coco have been filled by now, and all the extra stuff you've been adding to make up the deficits are now available...abundantly...
and who told you that about cannabis loving P?.....it's the least needed of the three....K......is where it's at, and at this point S.....not P....not ever that much P

and i'm not guessing....

 

[Black Thumb]

Hey guys, I've got little problem around 3 weeks till finish. But it's going worse every day and really fast! I grow in coco, I'm adding 0.2-0.3 grams per liter of MKP and epsom salt with some extra calcium. And base nute of course.

All leaves (new and older) are lime green, despite I fed them full strenght. So I guess this is not N deficiency based on my previous grows and experience. Leaves are yellowing on the outside edges, center of leaves are lime green. Some leaves as you can see, have rusty spots on the edges, but not all.





I am thinking about S or K. But I think I am adding enough epsom salt (so enough S). Also, K at this stage I think it's well covered with MKP (also being in coco means a lot of K from it), I plan to use K sulphate maybe next week or 10 days.

Any opinions, please?

Whats your PH ? I was having issues like this in flower and veg, coco perlite mix. I tried everything, im still recovering. I started raising the ph to 6 and they started to green back up.

 

[NOOOBIENOT]

that is nute burn all the way, back off on the nutes by half and ph water to 5.8 for coco the leaves wont repair but it may help with the building up of the buds , with 3 weeks to go you wont see a lot of change but it will help with it continuing to spread further on the plant

 

[KarmaKav]

Ty guy NICK ...(I think my prb is Ca def so)View attachment 1895245View attachment 1895246View attachment 1895247
U r perfect doctor for us..
Wish to hear more and more from u and your exp/////
Very very good issue....
BEst wishes ....

How long did it take for your plants to flower? Mine just keeps getting taller with more leaves, but no sign of buds. Your's are beautiful!

 

[CanadianDank]

From flip usually ten days or so for a properly vegd plant.
Could be more for sativa leaning strains though
What are you working with?

 

[Pawnee]

New to growing and to site. Very nice read for begginers like myself. I've been relying on YouTube incredibly too long!!

 

[Bourbon 2]

Gents I need some advice. I'm a hobbyist at growing but I've never had this issue before. Two plants, Blueberry Kush and Chem Dog #4 are only in the 4wk of flower (soil) and theyve continued to yellow, your input is much appreciated.
Cheers

 

[myfloridagreen882]

A deficiency of this causes yellowing of the leaves. its common during vegetative simply because the plant is using it up just as fast as your putting it in. It also happens during flowering sometimes because most flowering fertilizers contain little or no nitrogen, as this is not a key nutrient in that phase of the plant's life cycle.

Normally the lack will be detectable on the lower some portion of the plant, on the more seasoned leaves. at that point, as it advances it will move upwards towards the more up to date development.

*unlike a magnesium insufficiency, nitrogen def will begin from the tips and works its direction inward* (sick get to mag def later). Above all else yellowing of leaves is brought about by this, and it will stunt development harshly!

 

[Bourbon 2]

A deficiency of this causes yellowing of the leaves. its common during vegetative simply because the plant is using it up just as fast as your putting it in. It also happens during flowering sometimes because most flowering fertilizers contain little or no nitrogen, as this is not a key nutrient in that phase of the plant's life cycle.

Normally the lack will be detectable on the lower some portion of the plant, on the more seasoned leaves. at that point, as it advances it will move upwards towards the more up to date development.

*unlike a magnesium insufficiency, nitrogen def will begin from the tips and works its direction inward* (sick get to mag def later). Above all else yellowing of leaves is brought about by this, and it will stunt development harshly!

So I asked for some cal-mag at my local supply store and showed photos of the deficiency, the dude swore up and down that my ph was too high. I always monitor levels but started 2nd guessing myself so here's the actual result. I applied the application and added a light foliar spray, hopefully I'll see positive results and get things back on track. Thanks for your input
Cheers

 

[raggyb]

My blueberry got some early yellow and I noticed them even on the seller's picture. So it could at least partially be a natural aspect of the blueberry in your blueberry kush. Someone said it was a light feeder but likes cal/mg. Just a thought cause I'm no expert.

 

[Bourbon 2]

My blueberry got some early yellow and I noticed them even on the seller's picture. So it could at least partially be a natural aspect of the blueberry in your blueberry kush. Someone said it was a light feeder but likes cal/mg. Just a thought cause I'm no expert.

That's good to know, this is the 1st I've grown these strains. The same is happening to my chem dog #4 too. Either way I'll update the results

 

[minhphuong66]

I will do this. thank you <3

 

[Esp42092]

Couldn't figure out how to post need help. What's wrong with my girls? Lol. The only thing I've dun different is not usejng epsion salt in every feed and I can definitely tell the difference in growth rate. With out it. Is this a mag deffncy? I'm getting epsion salt tommaro my pH is on point every feeding.

 

[Bourbon 2]

Couldn't figure out how to post need help. What's wrong with my girls? Lol. The only thing I've dun different is not usejng epsion salt in every feed and I can definitely tell the difference in growth rate. With out it. Is this a mag deffncy? I'm getting epsion salt tommaro my pH is on point every feeding.

Where are you at in your grow, early, mid or late flower? Hydroponic or soil?