LEAF PROBLEM....Please Help

[BigBee78]

Really need some help here. I have attached the photo that shows some discoloration only on the top leave(s) of my OG KUSH plant entering week 4 and recently just changed out and added NEW RO Water and new Nutrients and this discolorization happens, I was not sure if this was a calcium, Potassium, and my plants should not have light burn and running high levels of CO2 it should not be Nutrient burn.

So since a plant can only take what it needs, I added another 30ML of CAL-MAG just to overcompensate it case its a Defencency.

I discovered this problem after a Nutrient change entering week 4 of flowering last night. This is the first time that I am using Botanicare and the recipe in week 4 called for a reduction in the CAL-MAG Plus from 210 ML to 126 and increased Hydroplex Bloom Enhancer from 126ML to 210ML. This also increased my PPM from 1860 to 1880.

My other 3 plants working off of a EBB-FLOW system are different strains and do not have this problem. Also to note that I increased the Nutrients to around 1900PPM which was also changed. I am also running CO2 at 1350 so it should handle the high PPM levels.

So please let me know if you have run into this problem so I can fix it really quick! And thanks so much for any help.

 

[MTNMEN]

https://www.icmag.com/ic/showthread.php?t=139843
hope this helps bro. I know cal-mg seems to be the go to but i wonder if epsoms might help? Idk man just trying to help a fellow gardener out.

 

[BigBee78]

I appreciate any help here, I think the problem is a CAL deficiency due to the rusty blotches that appear in the middle of the leaf. I had seen early signs but I guess when I lowered the CAL_MAG Plus from 310 PPM to 186 PPM in week 4, it probably intensified the problem.

I am still unsure so if you or anyone had the same issue for now I added 30ML or about 80 PPM to my reservoir for feeding tomorrow. Hopefully increasing the CAL_MAG will clear up the problems. If its not the issue please let me know so if I have to flush then it will come to that.

Thanks and please let me know if you can help out!

 

[MTNMEN]

I think the last post in the thread i linked is sound advice.

 

[mackdx]

I'm going to offer an alternative view....

If you are feeding at 1900 ppm, then you are looking at an EC between 3 and 4, depending on the scale your pen is reading. My guess is you are having lockout issues that are being made worse by adding even more nutrients. Please post the following :

Grow style (soil, coco, hydro, etc)
Complete nutrient regimen (mfg, base, additives) including quantities per gallon.

 

[BigBee78]

Here is my Grow Style / Schedule

Here is my Grow Style / Schedule

My grow style is Hydro in a completely airtight environment running CO2 at 1350. I currently use Botanicare Pro Nutrients using the following:

Just began Week 4:

I have attached my grow schedule:

 

[mackdx]

I assume those numbers are ml. What's the volume of water they a few being added to?

 

[BigBee78]

Here is the recommended Botanicare PPM Chart

Here is the recommended Botanicare PPM Chart

The recommended chart I have attached targets 2100 PPM as the max when running full 1500 CO2, I am running 1350 so I assume in a sealed room that this strain OG Kush could hang in there at these PPM entering week 4 of Flowering.

I did see small traces of this reddish tint blotches located in the middle of the leaf so I assume that since I am also using RO Water has no purification's so such factors like CAL, MAG, Potass... are not in RO water so I would assume that you have to increase CAL-MAG since I think its a CAL definciency?

Here is the Specs for CAL-MAG
https://www.hydroempire.com/content/downloads/calMag-brochure.pdf

Please let me know if any additional information is needed in order to figure out this problem

 

[BigBee78]

42 Gallon Res....

42 Gallon Res....

42 Gallons Reservoir - EBB and FLOW - Flood 3 times a day every 4 hours

 

[BigBee78]

Also I found this chart, the one on the right is my nutrient recipe it shows CAL-MAG decrease while the chart on the left shows no drop in week 4.

So maybe the early signs of the reddish blotches appeared a few weeks ago was from a CAL deficiency and when I decreased the ML from 210 to 126 on my nutrient recipe it intensified the problem? So maybe adding additional CAL-MAG may solve or stop the deficiency if it is that?

Help? Here is the attachment:

 

[BigBee78]

I also see that Botanicare recommends you to add 3-5 ML extra of CAL-MAG to the final solution?

 

[BigBee78]

Also I have three other plants -

Indica | Indica - Sativa and a Sativa which have no problems. Could be that the OG KUSH needs more of something more than the other plants. What do you think anyone?

 

[mackdx]

Also, what is pH?

 

[BigBee78]

I have been running a constant PH of 6.0, it has not deviated from this number since it does not fluctuate very much from using RO water.

The water temperature is constant at 72-74

The room is sealed at a temperature of 72-73 degrees (F)

 

[BigBee78]

No problems with bugs..spider mites since the temperature for an sealed indoors grow at below 74 degrees prevents bugs

 

[BigBee78]

Found an Image resembling my leaf problems

Found an Image resembling my leaf problems

So i was looking around and seen this same tint, reddish though they have spots, mine blotches not sure if this be displayed both ways>

Check this pic out: What do you think?

 

[BigBee78]

This might help also:

Certain strains of marijuana have higher chances of experiencing a calcium deficiency than other strains. Some strains – sometimes even some specific plants within one strain – have more calcium than the plants next to them. This means it is not uncommon for one plant to exhibit signs of a calcium deficiency while the rest of your plants are happy and thriving.

Calcium is a semi-mobile nutrient, so the signs of a calcium deficiency begin with the new growths on your plant, but they will start moving after a period of time. You will first see it in the new growths towards to top of your plant as well as the middle vegetative growth. This is simply because it appears first in the area that is growing the fastest.

This is exactly the same thing that is happening..soooo do I add more CAL-MAG supplement to clear this problem up?

 

[BakedBandit]

I think you are over feeding bro. If you wanna add cal mag dilute the rest of your Rez first.

 

[BigBee78]

How much do you think I should dilute the existing nutrient solution before adding CAL-MAG?

I added 30ML of CAL_MAG and added around 2 gallons of water to a 42 gallon reservoir. It took the PPM's up to 1920 then when I added the fresh RO water (2 Gallons), it took it down to 1860. I am thinking of taking it down to 1800 with fresh RO water as the PPM's around mid 1700's a few weeks back did not have any problem.

What do you think? It could be that the PPM's are too high but with 1350 Co2 (only when the lights are on 12/12 flowering) should overcompensate since the 1900 PPM are in an aggressive state not Super Aggressive which comes at 2100 according to Bonicare Nutrients website.

I also read where others have used 50 percent of the recommended manufacturers nutrients, some at 70 percent, but if these feeding charts max out at 2100, i'm at 1880, and I just dropped it to 1860 PPM's then with supplemental CO2 it should be ok right?

 

[BakedBandit]

I say drop it more. I never use even close to what they recommend on the bottles.