Help with leaf problem

[RottyRzr]

I posted earlier and came back to check responses and cant find my post.
I have a couple autos going and one of them has brown/rust patches on the leaves. The affected plant is growing indoors, in a tent, in a 5 gal. smart pot. It's in Ocean Forest soil with extra perlite added. Nutes have been the Techniflora recipe for success package until this last feeding, which was Masterblend.
I adjust the ph to 6.4.
Ive looked at multiple websites and the problem kinda looks like phosphorus deficiency. Ive given a light (1/3) feeding with PK 13/14 last week and the problem still appears to be spreading.
This plant is 8 weeks old.
Not sure what else to include so please ask if more info is needed.
Oh. The other plant is in coco loco. Same nutes and it looks ok.
Any ideas?
Thanks

 

[Tracker]

I posted earlier and came back to check responses and cant find my post.
I have a couple autos going and one of them has brown/rust patches on the leaves. The affected plant is growing indoors, in a tent, in a 5 gal. smart pot. It's in Ocean Forest soil with extra perlite added. Nutes have been the Techniflora recipe for success package until this last feeding, which was Masterblend.
I adjust the ph to 6.4.
Ive looked at multiple websites and the problem kinda looks like phosphorus deficiency. Ive given a light (1/3) feeding with PK 13/14 last week and the problem still appears to be spreading.
This plant is 8 weeks old.
Not sure what else to include so please ask if more info is needed.
Oh. The other plant is in coco loco. Same nutes and it looks ok.
Any ideas?
Thanks

Can you post some pics?

 

[RottyRzr]

Can you post some pics?

 

[PKLIP]

It looks like a calcium deficiency to me. There is some in the potting soil, but it is going to be depleted pretty quickly since it is a Macronutrient. Also if you cut the soil with perlite there is even less. I would add some Cal-Mag and things should bounce back pretty quickly.

 

[Tracker]

Like I said in your other post, it looks liKe Ca def.

Brown patches on leaves--Help

This is an 8 week old auto. Its in a 5 gallon fabric smart pot. Soil is ocean forest with 25% perlite. Nutes for most of the grow have been technaflora recipe for success. I gave them masterblend 4-18-38, magnesium sulfate and calcium nitrate @ 2.4-1.2-2.4 grams last week. Pictures Ive found...

rollitup.org

Look at the pictures and descriptions here

A visual guide to cannabis deficiencies

Worried about your plant health? See a cannabis deficiency that you cannot identify? Our guide to cannabis deficiencies may help you solve your problems

dutch-passion.com

 

[RottyRzr]

Thanks for the replies! And sorry for the multiple posts.
The picture of calcium deficiency on that site at dutch passion does look a lot like my plant. I already gave them a foliar application of the calmag +. Should I also give them some in the soil?

 

[Tracker]

Thanks for the replies! And sorry for the multiple posts.
The picture of calcium deficiency on that site at dutch passion does look a lot like my plant. I already gave them a foliar application of the calmag +. Should I also give them some in the soil?

I add calmag into every feeding all the way through veg and first few weeks of flower. The Ca in the Calmag product I use is from calcium nitrate, so it has nitrogen also. I'm observant for signs of N toxicity when I use it, and I cut it back after the flower stretch.

 

[RottyRzr]

I add calmag into every feeding all the way through veg and first few weeks of flower. The Ca in the Calmag product I use is from calcium nitrate, so it has nitrogen also. I'm observant for signs of N toxicity when I use it, and I cut it back after the flower stretch.

The last feeding I did was with the masterblend, epsom salt and "calcium nitrate". Would adding calmag possibly be too much calcium---if there is such a thing.

 

[Tracker]

The last feeding I did was with the masterblend, epsom salt and "calcium nitrate". Would adding calmag possibly be too much calcium---if there is such a thing.

Yes there is such a thing as too much, causing toxicity and lockout.

 

[RottyRzr]

Thanks for the chart. Im not quite sure how to read it so I'll look it up later. Do you think I should still add CalMag if Im using Calcium Nitrate as part of the fertilizer mix?

 

[Tracker]

Thanks for the chart. Im not quite sure how to read it so I'll look it up later. Do you think I should still add CalMag if Im using Calcium Nitrate as part of the fertilizer mix?

Were you adding calcium nitrate and magnesium sulfate already before you saw the symptoms on leaves, or did you start adding those after seeing symptoms? Are you using tap water, RO water, rain water, ...?

On the chart, the red lines mean that when one is too high, that can be expressed as blocking the other(s) on the red lines (antagonistic). The green lines mean those nutrients work together (synergistic).

 

[RottyRzr]

I was using technaflora nutes to begin with. Our local grow shop sold me the little "suitcase" box (https://www.technaflora.com/product/recipe-for-success/). I was using them according to their instructions. After the problem began, I switched up to the masterblend/mag sulfate/calcium nitrate. I already had those since I use them to grow hot peppers in both soil and dutch buckets. I know the masterblend mix is good stuff so I was hoping it would cure the weed problem.
I use tap water which is well water. My tap water checks out at 155 ppm with my Apera TDS pen. I always have to use ph up because my water is acidic.

Appreciate the chart and thanks for the help. I went ahead and gave the plants some calmag + by botanicare this morning. The bottle instructions say 3-5ml/gal so I ended up going with 5ml/gal this time.

 

[Tracker]

I was using technaflora nutes to begin with. Our local grow shop sold me the little "suitcase" box (https://www.technaflora.com/product/recipe-for-success/). I was using them according to their instructions. After the problem began, I switched up to the masterblend/mag sulfate/calcium nitrate. I already had those since I use them to grow hot peppers in both soil and dutch buckets. I know the masterblend mix is good stuff so I was hoping it would cure the weed problem.
I use tap water which is well water. My tap water checks out at 155 ppm with my Apera TDS pen. I always have to use ph up because my water is acidic.

Appreciate the chart and thanks for the help. I went ahead and gave the plants some calmag + by botanicare this morning. The bottle instructions say 3-5ml/gal so I ended up going with 5ml/gal this time.

I use the same Calmag+ product. My base nutes for indoor are GH Flora and base for outdoor is GH Maxi. The Calmag+ is adding quite a bit of nitrogen at 5ml/gal. When already using veg nute schedule, you might get n-claw. Just be careful to not overdo it. If the issue is Ca def, the leaves already showing damage will not get better, but the symptoms should not spread or show on new growth.

Good luck! Peace

 

[RottyRzr]

I use the same Calmag+ product. My base nutes for indoor are GH Flora and base for outdoor is GH Maxi. The Calmag+ is adding quite a bit of nitrogen at 5ml/gal. When already using veg nute schedule, you might get n-claw. Just be careful to not overdo it. If the issue is Ca def, the leaves already showing damage will not get better, but the symptoms should not spread or show on new growth.

Good luck! Peace

Thanks for all the help Tracker. I only intend to give the 5ml/gal for this first time. Next time I'll give a lower dose.

 

[2com]

The last feeding I did was with the masterblend, epsom salt and "calcium nitrate". Would adding calmag possibly be too much calcium---if there is such a thing.

With no clue how much of something you're actually adding now, nor what the recommended dose actually equates to (in some metric or other), how could you even know what should be there, let alone if it's too much or too little.

Use an online nutrient profile calculator to get an idea (eg: Cannastats), or get a program/app like Renfro made in excel: https://rollitup.org/t/understanding-and-calculating-nutrient-ppm.995409/

 

[RottyRzr]

With no clue how much of something you're actually adding now, nor what the recommended dose actually equates to (in some metric or other),

Im guilty sometimes of just using what the manufacturer recommends. I did do some checking and it looks like my normal nutrients are in ppm:
N-123
P-50
K-200
Mg-34
Ca-120
B-1.3
Cu-3.2
Fe-2.5
Mn-1.3
Mo-.06
Zn-.3
S-41

Seems like Im a little off of the Lucas formula of N-122 P-99 K-171 Mg-68 and a recommended 100-150ppm of Ca.
I added 5ml/gal of the Calmag + which increased my Nitrogen to 149, my Ca to 162, Mg to 50 and Fe to 3.8.
Looks like my Nitrogen and Calcium are a little high. These figures don't take into account that my well water is usually 155ppm. I don't know how that 155 breaks down. Ive never had it tested.

 

[2com]

Great! Now you have a sense of what's going on "quantity" wise with the elements you're feeding.
You don't *need* to copy the lucas ratio/formula, that's not what I was getting at.

So, for example, when you're told that "you need to give them calmag", you can reference how much you're supplying the plant *now*.
Random made up example: You see that your nutrient mix should be supplying 100ppm of calcium. You have a plant issue. A guy tells you to calmag. You look up what the suggested rate of "cal-mag-afication" would provide in terms of elemental calcium, magnesium, and whatever else might be in it (nitrogen, etc.). You see that, if you add the calmag, you'll now be providing an additional 53ppm of calcium, and 38ppm of magnesium, etc. Which would bring your calcium level to 153ppm.

It's a tool to have an idea or good estimate of the amounts that you're actually supplying to a plant.

Without all the other parameters of the environment... it's not nearly as useful, obviously.

 

[2com]

Just fwiw; a "deficiency" symptom doesn't necessarily mean the fertilizer, or the media is deficient...

If you can, it'd be good to see what that 153ppm in the well water is. Maybe you could check around with any nearby ag businesses(?) and see if they've done a test... I'm just throwing ideas, duno about that one - different well/source, different contents...

You could look up your city though, some publish water test results.

 

[RottyRzr]

Update and looks like I still need help. These plants are not recovering. This past Monday (16th) I gave them 5ml/gal CalMag+. At that time my wife trimmed off the affected leaves so it would be easier to notice if the problem was spreading. Ive been noticing some of the leaves turning yellow with brown patches coming back. Today, I mixed up more CalMag+ at the 5ml/gal rate and did a foliar spray. Im beginning to wonder if this may be something besides calcium deficiency. This problem was confined to my white widow autos but now I see some of the leaves on my Jack Herer auto getting light colored and some have the same yellow/brown patches as the white widows. I have a OG Kush photo growing in the same space that looks wonderful. Its getting the same nutes as the others.
Asking for help again.
First and second pics (White Widow auto. About 3 weeks since seeing flowers start)
Last two pics are the Jack Herer auto.

 

[2com]

...Im guilty sometimes of just using what the manufacturer recommends. I did do some checking and it looks like my normal nutrients are in ppm:
N-123
P-50
K-200
Mg-34
Ca-120...

You seem to have reasonable levels of these elements in your solution. You certainly don't need to add more calcium - based on these numbers anyway, but that depends on your grow environment, and I duno what all those parameters are.
Is ocean forest a peat based mix? I don't grow in it. I have. But someone else would be better to help ya I think.

Calcium, though, is an immobile element. The plant can't "re"-locate it, eg: from old leaves to new growth. Calcium transport heavily depends on transpiration for uptake, so it's greatly affected by VPD, and humidity specifically.
I'm not saying you have a calcium issue, just trying to share a few things about it.

Anyone, feel free to correct me on any of that.