Yellowing, brown spotting, drying leaves (with PICS)

[community]

Ok, here is my setup....

• Hydro or Soil Jungle Growth Soil from Lowes
• Type of light? (600 Watts, 2100K, 12 inches, 12/12)
• "Atmosphere" Conditions (73F-83F, 38-40 RH, 145 CFM Centrifugal venting the cab, one oscillating fan)
• Waterings (RO/DI at 0 TDS, 1 Gallon of nutrient solution every other day for 5 plants in 1 gallon pots)
• PH Range (unknown)
• Nutrients/Supplements (Botanicare, Used every watering)

• Pure Blend Pro Grow (1.5-4-5)
• CAL-MAG PLUS (3-0-0)
• LIQUID KARMA (.1-.3-.5)
• Sweet (none)
• Silica Blast (none)
• Dosing schedule: http://www.hydrofanatics.com/schedul...g_feed2_sm.pdf (Look under "Soil Formula" NOT hydro. I am using week 6 dosing schedule)
• For more information specifics: Botanicare : Products : Product Overview : Nutrients

• Pictures if possible! (Will have some soon)
• Plant Ages (4.5 weeks of veg, currently on week 4 of flowering)

I found these really nice pictures on the internet. I cannot decide on any. I know its not Zinc. It looks like either, magnesium, potassium, manganese. The strain is some sort of hybrid strain with mostly sativa genetics. It's bag seed. Any help?

[community]

no ideas anyone? I tried upping the dosage of the Cal-Mag to see if that will do anything.
Also sort of looks like this too. Weird...

[TexarkanaTim]

You are feeding them waaaay too often. Every other day for nutes is burning them. Flush them out with water and let them dry out a bit. Add your nutes no more than once per week.

[wunschshrek]

Personally, I only feed them every other watering.

And I water them anywhere from every 3-6 days.

I don't do the finger test, get a feel for how heavy your bucket is when its wet, and how light it is 3-4 days later when its dry.

Marijuana doesn't want its soil to stay wet, it needs to go from wet, to dry, to wet, to dry -- so that the roots can get oxygen.

Marijuana can survive a drought and time without nutes much better than it can overwatering and overnuting.


You are doing this without a PH meter? Those nutes are going to make the PH of the water you are putting into it very acidic if you aren't adding PH UP to balance it out.

[community]

Originally Posted by TexarkanaTim

You are feeding them waaaay too often. Every other day for nutes is burning them. Flush them out with water and let them dry out a bit. Add your nutes no more than once per week.

Botanicare says to use with every watering...so abandon what they suggest? I also have some ClearX which is a Botanicare product that leaches out the nutes from the soil during the final flush.. should I use this?

[community]

Originally Posted by wunschshrek

Personally, I only feed them every other watering.

And I water them anywhere from every 3-6 days.

I don't do the finger test, get a feel for how heavy your bucket is when its wet, and how light it is 3-4 days later when its dry.

Marijuana doesn't want its soil to stay wet, it needs to go from wet, to dry, to wet, to dry -- so that the roots can get oxygen.

Marijuana can survive a drought and time without nutes much better than it can overwatering and overnuting.


You are doing this without a PH meter? Those nutes are going to make the PH of the water you are putting into it very acidic if you aren't adding PH UP to balance it out.

Wow man every 3-6? The reason why I water so often is because the soil does feel dry. When I killed a male, I inspected the root ball for moisture an it wasnt terribly moist. About as moist if you would dry your hands with a towel and briefly touching it. Or sort of like when you buy fresh soil and you put your hands in it and it has that little bit of moisture in it.

It is not wet soil that's for sure. I know what an over watered MJ plant looks like.

I do have a pH meter, but I do not take it seriously, because the readings are eratic and can show a pH of 8 to a pH of 4, which is impossible. I need a better pH meter or a chemical soil testing kit.

Chemical seems much more reliable than probes...I had a soil test kit a while ago, but I lost some components to test.

I will give some test results later today.

[wunschshrek]

Originally Posted by community

Wow man every 3-6? The reason why I water so often is because the soil does feel dry. When I killed a male, I inspected the root ball for moisture an it wasnt terribly moist. About as moist if you would dry your hands with a towel and briefly touching it. Or sort of like when you buy fresh soil and you put your hands in it and it has that little bit of moisture in it.

It is not wet soil that's for sure. I know what an over watered MJ plant looks like.

I do have a pH meter, but I do not take it seriously, because the readings are eratic and can show a pH of 8 to a pH of 4, which is impossible. I need a better pH meter or a chemical soil testing kit.

Chemical seems much more reliable than probes...I had a soil test kit a while ago, but I lost some components to test.

I will give some test results later today.

I had all kinds of trouble until I invested in a good digital PH meter myself, it really does make things easier.

I recommend for one under 80 dollars, this one : Hanna Gro' Check Portable pH Monitor |

My R/O water PH is around 4.5, after I add calmagplus, liquid karma and foxfarms growbig it is down in the high 3's.

If you aren't balancing it back up to 6.5'ish, I would have to think that would be the problem.

Did you mix any dolomite lime in with your soil? This will have buffer your soil PH to around 7. Some people say you can add some to the top layer of your soil / mix with your water but honestly I don't know personally if that works, I always mix it in with the soil before hand.

Good luck mate.

[community]

Originally Posted by wunschshrek

I had all kinds of trouble until I invested in a good digital PH meter myself, it really does make things easier.

I recommend for one under 80 dollars, this one : Hanna Gro' Check Portable pH Monitor |

My R/O water PH is around 4.5, after I add calmagplus, liquid karma and foxfarms growbig it is down in the high 3's.

If you aren't balancing it back up to 6.5'ish, I would have to think that would be the problem.

Did you mix any dolomite lime in with your soil? This will have buffer your soil PH to around 7. Some people say you can add some to the top layer of your soil / mix with your water but honestly I don't know personally if that works, I always mix it in with the soil before hand.

Good luck mate.

Wow thanks for the advice. I do not add any lime to the soil. I did not know the pH of those solutions are so low. I am flushing them today..

How's Three gallons of water for 5 plants? Will this flush them? Also, I am testing the soil run off tonight with a Mosser Lee Soil test kit. Its a pH NPK test kit that you can pick up at any plant store.

Botanicare should put some instructions on the bottle or a product to balance pH. I really did not think those solutions were that LOW.

[community]

Test Results:

Ok. I tested the run off on one container. I collected about 50 mL of water into a small plastic cup.

Using the MosserLee test kit. I tested the values of pH, Nitrogen, Potassium, Phosphate.

My results were:

pH of 5
Nitrogen-Very High
Potassium-Very High
Phosphate-Very Low

The pH sacle was from 4 to 8 range. The color developed in the test is corresponds to a particular nutrient level. The nutrient levels are based on a scale of "Low", "Medium" and "High". The colors that developed were off the color chart scale, as a result, I said "very" to show how high bright the colors were. I can only conclude that the nutrients are very high because of these tests.

MosserLee suggests for example, tomatoes to be kept at a nutrient range of "High" in N-P-K.

Ok. So have at it guys. What's my plan of action? I am flushing right now.

[community]

TEST RESULTS NUMBER 2 (After flush)

Ok. I tested the run off on one container. I collected about 50 mL of water into a small plastic cup.

Using the MosserLee test kit. I tested the values of pH, Nitrogen, Potassium, Phosphate.

My results were:

pH of 6
Nitrogen-Very High a little lower
Potassium-Very High
Phosphate-Very Low

[community]

Ok so I found a couple of products that are phosphate only and I think I might go with that on top of my current regiment and reduced nutes and waterings too.


what do you guys think? Flush some more?

[community]

bumptasic

[bongstar420]

I think you need more P....that silica should have P value, so dont omit it from fert figuring. Many fert schedules work..Once i ferted every two days with a freakin table spoon and a half of dry high P fert outdoors in the heat with no burning


Here is a mixing tip by ratios...

Pure Blend Pro Grow (1.5-4-5)
CAL-MAG PLUS (3-0-0)
LIQUID KARMA (.1-.3-.5)
Sweet (none)
Silica Blast (none) 0-0-3

This is your fert right. If you mix in a 1:1:1 ratio you get:

1 part 1.5-4-5
1 part 3-0-0
1 part .1-.3-.5

4.6-4.3-5.5 if you give one dose of each togather (edit: I originally didnt add the 3-0-0 on accident)

if you mix and take one dose from the mix then the numers are 1/3 the total rating because it is a three part formula

Flowering pot should be fed something like 2-8-6 or 2-9-6 every day or (6-24-18) 2-3 times weelky....Either check the ppm/ec in the runoff or flush periodically to aviod over application problems

[community]

so yeah its looking a lot worse. the entire plant is afflicted with these leaves. should i flush again? these plants look crispy. some of the leaves seem to fall off and are really dry. what if it dies? can i still harvest?

[community]

SO even after the first flush it looks worst. i tested agian and the same results as the second. i decided to flush with a mild solution of pro bloom. any ideas? nope.