deficiency problem

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dan2581

Active Member
Hey guys, in my veg room one of my strains, heavy duty fruity, is showing some deficiency.

They are in roots organics potting soil on an organic nutrient lineup.

They have interveinal brown rust spots, interveinal necrosis (grey coloring), and leaf tips curl upwards as the leave tip dies. Progresses from tip back. Starting from bottom leaves up.

Any ideas?

They do get fed cal/mag weekly. That was my guess and I know they get the shit.
 
Snow Crash

Snow Crash

Well-Known Member
Sounds like you need to flush the soil. You have a build up that is locking out magnesium and probably potassium as well.

Dial in the pH and rinse it good. Go lighter on your nutrient feedings and get more run off in the future.
 
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dan2581

Active Member
I am very accurate with my pH readings and i'm feeding these little guys very light using a 1-1-1 ratio thrive alive B1 (the organic shit). I also use calmag 1/2 str cal mag for obvious reasons.

I have a bluelab soil pH meter, which will also pH my nutrient solutions. It is always calibrated and gives VERY accurate results (it is $400 retail mind you).

All my solutions are made to 6.3 using earth juice natural up and down. My soil is exactly 6.3 (tested when wet of course).

I really don't know what the fucks going on here. It's progressing worse. This must be from one of the mobile elements because it is working itself up the plant from older fan leaves first, only mobile elements move like that.
 
Snow Crash

Snow Crash

Well-Known Member
Soil pH is from 6.5 to 7.0...

You're running 6.3.

We said it sounded like a pH problem.

Your pH isn't in the right range.

Do you see where I am going with this???
 
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dan2581

Active Member
6.3 is what I feed with. The pH range actually fluctuates from 6.3 to 7.0 because the only other food it gets is RO water which is 7.0. The pH shifts from 6.3 to 7.0 during the week and makes all nutrients available in the 6.3-7.0 range.

I don't think this is a question of availability due to pH, but rather something else interfering with uptake of the nutrients.
 
dannyboy602

dannyboy602

Well-Known Member
Can I suggest taking one plant out of it's pot and getting a good look at the root system?
You can always put into a larger pot right? You won't lose mush time in your grow.
While your looking at the root system ask is the plant potbound? Are the roots encircling the pot with no place to go? If so ask and I'll tell you how to root prune.
Are there nemetodes or any insect larvae on the roots? Eatting the roots and killing your plant.
Are the newest roots healthy, white and hairy? Are they dark and dead looking?
How does the root ball smell? Fungus is easy to smell. And difficult to get rid of.
People so many times treat without looking at every part of the plant. It really isn't a science. Just a desire to make something grow.
 
Devildog93

Devildog93

Well-Known Member
dan2581 said:
6.3 is what I feed with. The pH range actually fluctuates from 6.3 to 7.0 because the only other food it gets is RO water which is 7.0. The pH shifts from 6.3 to 7.0 during the week and makes all nutrients available in the 6.3-7.0 range.

I don't think this is a question of availability due to pH, but rather something else interfering with uptake of the nutrients.
Click to expand...
You are possibly correct.

But I agree with what Snow Crash said, lockout due to buildup. Your soil can still be pH'd properly, but an imbalance of one nutrient can sometimes cause the lockout of another.

And as far as you saying you fed it a mild solution and things seem better...... I live by the rule of NOT feeding what is recommended on most nute instructions. 1/3 or even sometime 1/4 dosage often produces very nice, full plants that come close to plants absolutely "boosted" to the max, but without as big a risk of burning the plants, or locking out the soil.


Can I suggest taking one plant out of it's pot and getting a good look at the root system?
You can always put into a larger pot right? You won't lose mush time in your grow.
While your looking at the root system ask is the plant potbound? Are the roots encircling the pot with no place to go? If so ask and I'll tell you how to root prune.
Are there nemetodes or any insect larvae on the roots? Eatting the roots and killing your plant.
Are the newest roots healthy, white and hairy? Are they dark and dead looking?
How does the root ball smell? Fungus is easy to smell. And difficult to get rid of.
People so many times treat without looking at every part of the plant. It really isn't a science. Just a desire to make something grow.
Click to expand...
I agree with this. Get to know what going on with the whole plant.
 
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