trying to head off a problem early

[ms48130]

This is a Girl Scout Cookie Auto, at about 17 days old.

I'm using Coco medium, Advanced Nutrients Sensi Coco Grow A&B, as well as Voodoo Juice and B-52 (2mL/L of each). Temp is about 80*F, Humidity is 60%, and HLG 100 LED is about 20" above the canopy. I understand that AN does not publish an EC target, due to their Perfect pH technology, they simply say,

>>When using our pH perfect line of nutrients there tend to be many other components besides dissolved fertilizer in the water. (eg. pH buffers, humic and fulvic acid, >>amino acids etc...)
>>
>>Because of this an electrical conductivity (EC, TDS, PPM) reading can be difficult for the grower to properly ascertain.
>>
>>Instead of reading the PPM/EC we recommend following our nutrient calculator at https://www.advancednutrients.com/nutrient-calculator/

So, the EC numbers are apparently meaningless when using AN nutes.

Here's a pic of a leaf (seems to be the only one so far) I found a short time ago tonite. I'm concerned about the yellow spotting in the top right of the leaf. If anyone has thoughts, I'd appreciate it.

 

[derek420colorado]

This is a Girl Scout Cookie Auto, at about 17 days old.

I'm using Coco medium, Advanced Nutrients Sensi Coco Grow A&B, as well as Voodoo Juice and B-52 (2mL/L of each). Temp is about 80*F, Humidity is 60%, and HLG 100 LED is about 20" above the canopy. I understand that AN does not publish an EC target, due to their Perfect pH technology, they simply say,

>>When using our pH perfect line of nutrients there tend to be many other components besides dissolved fertilizer in the water. (eg. pH buffers, humic and fulvic acid, >>amino acids etc...)
>>
>>Because of this an electrical conductivity (EC, TDS, PPM) reading can be difficult for the grower to properly ascertain.
>>
>>Instead of reading the PPM/EC we recommend following our nutrient calculator at https://www.advancednutrients.com/nutrient-calculator/

So, the EC numbers are apparently meaningless when using AN nutes.

Here's a pic of a leaf (seems to be the only one so far) I found a short time ago tonite. I'm concerned about the yellow spotting in the top right of the leaf. If anyone has thoughts, I'd appreciate it.
View attachment 1224003

Could be bug damage. Have you checked throughly for bugs

 

[GeorgeCloney]

Did you condition the coco with calmag/calcium?
The spot could be a water drop with nutes.
Or could be a calcium def'c ( just starting).
Dont stress over it.
Don't try and fix it yet.
Wait for more spotting prior to fixing.
Sometimes our solutions are worse than our problems.

 

[ms48130]

Could be bug damage. Have you checked throughly for bugs

I have not checked for bugs, I guess I'll have to learn to do that. Thank you.

 

[ms48130]

Did you condition the coco with calmag/calcium?
The spot could be a water drop with nutes.
Or could be a calcium def'c ( just starting).
Dont stress over it.
Don't try and fix it yet.
Wait for more spotting prior to fixing.
Sometimes our solutions are worse than our problems.

I used Batch 64’s Fortified Micro Blend (formerly Pioneer) coco medium, which comes triple washed and organically buffered (from their website).

AN says no need for CalMag when using their coco-specific nutes, but I've been dropping in about 0.5ml/L just in case.

I have had water droplet w nutes hit a few leaves, as my nutrient application sprayer arrives today. Nute water hitting the leaves is a fo sho thing.

Thanks for the ideas and thoughts.

 

[ms48130]

UPDATE: While I mentioned in my first post that AN sees the EC numbers as irrelevant, I decided to run my ppm's anyway. My R/O water nute mix measures ~650 at mix time, but the runoff is >2500. That big of a difference does concern me. I've sent a note to AN's support team to see if this is in a range that they might expect...

 

[derek420colorado]

UPDATE: While I mentioned in my first post that AN sees the EC numbers as irrelevant, I decided to run my ppm's anyway. My R/O water nute mix measures ~650 at mix time, but the runoff is >2500. That big of a difference does concern me. I've sent a note to AN's support team to see if this is in a range that they might expect...

You’ve got somethin waaay off. You need to flush the pot with 3X the volume with ph’d water. If the pot is 3 gallons you need 9 gallons of water. Then start over with your regular feed on your next fertigation

 

[ms48130]

You’ve got somethin waaay off. You need to flush the pot with 3X the volume with ph’d water. If the pot is 3 gallons you need 9 gallons of water. Then start over with your regular feed on your next fertigation

Thanks.

It's a bit frustrating that AN gives a bit of a "non-answer" but the runoff results did seem very strange even to a noob like me!

 

[ms48130]

You’ve got somethin waaay off. You need to flush the pot with 3X the volume with ph’d water. If the pot is 3 gallons you need 9 gallons of water. Then start over with your regular feed on your next fertigation

so this is my first time flushing...

I've got the runoff within 100ppm of the flush (ph balanced water), can I actually get it lower (how close is close enough?)

edit: within 50ppm

 

[Bob's Auto's]

so this is my first time flushing...

I've got the runoff within 100ppm of the flush (ph balanced water), can I actually get it lower (how close is close enough?)

edit: within 50ppm

And as important. How's the runoffs pH?