Brown Spotting in Flower

[MrAutoGrower]

Ph going in is around 5.9-6.
Ppms going in is around 400ppm.

Same ph in run off.
Almost same ppms in run off.

Room RH RANGE : 55-70
Temp Range: 24 - 28

Okay, so i have had this issue with most plants ive ever grown with Advanced nutrients.

The light is quite close but i have dimmed it down. I cannot fix the light distance because there's no more room. She is under a 240w kingbrite.

I have a stardawg under a mars hydro ts600 and she doesn't have any issues and is flowering amazingly.


So usually this spotting stuff comes down to a nutrient lockout and I'm not sure if this is true.

I am growing in coco and feeding till run off every day. Around 3-4L per day. I am using 3ml sensi coco bloom and 3ml big bud per 4L which results in just under 400 ppms.

I have checked the run off water ph and ppms and it is almost the same as what I am putting in. I mean, if its a lockout, then why hasn't the ppms rised from the salts? And why is my ph still in range?

I have checked the internet for ages and no one seem to have an answer to these spots... except to feed calmag which can make things worse. Surely sensi coco bloom has enough calmag in there. Their nutrient calculator doesn't even have sensi calmag xtra listed for use.

All help is appreciated.

 

[MrAutoGrower]

@Mañ'O'Green i have heard you are a nutrient genius. Can you shed any light on this? It doesn't seem to be affecting my plant greatly but it always seems to appear on the upper canopy. Never really the lower canopy. Those nearest the light and i just want to figure it out to prevent it happening ever again

 

[Mañ'O'Green]

@Mañ'O'Green i have heard you are a nutrient genius. Can you shed any light on this? It doesn't seem to be affecting my plant greatly but it always seems to appear on the upper canopy. Never really the lower canopy. Those nearest the light and i just want to figure it out to prevent it happening ever again

It is not your LED light They do not burn plants - period! Unless they actually touch the diodes.

It is a Phosphorus problem and I would guess it is because you are mixing vendor lines. Too much phosphorous.

 

[MrAutoGrower]

It is not your LED light They do not burn plants - period! Unless they actually touch the diodes.

It is a Phosphorus problem and I would guess it is because you are mixing vendor lines. Too much phosphorous.

Im not mixing vendors. Im feeding advanced nutrients sensi coco bloom and advanced nutrients big bud.

I have been giving the same feedings to stardawg and she is further ahead in flower and not one burned or spotted leaf

 

[Mañ'O'Green]

Ok then we need to look elsewhere.

Then our next suspect is too much Calcium. What is the source and make-up of your starting water?

What are all of your inputs? list them please.

 

[MrAutoGrower]

Ok then we need to look elsewhere.

View attachment 1349379

Then our next suspect is too much Calcium. What is the source and make-up of your starting water?

What are all of your inputs? list them please.

My tap water is around 36-40 ppms. I can provide a screenshot of whats in it apparantly according to the water study done.


The plant is quite dark green. Not too dark. But im wondering if somehow its getting more nitrogen than it wants.

Sensi coco bloom part A is 4-0-0.
Sensi coco bloom part B is 0-4-4.

Big bud is 0-4-4.

Dose is 5ML per litre from advanced nutrients calculator. I'm using around 1ML per litre

 

[Mañ'O'Green]

Are you using Big Bud Coco? or regular Big Bud?

 

[MrAutoGrower]

Are you using Big Bud Coco? or regular Big Bud?

View attachment 1349380

Big bud coco

 

[Mañ'O'Green]

Big bud coco

Well something is out of balance and it says "weird" nutrient deficiencies from AN?

You need a lab to chase this down because something is not as it is supposed to be? Are your nutrients fresh? Do any of the bottles have sediments? Have you ever cross contaminated them?

Yes I want to see your water report.

 

[MrAutoGrower]

Well something is out of balance and it says "weird" nutrient deficiencies from AN?

You need a lab to chase this down because something is not as it is supposed to be? Are your nutrients fresh? Do any of the bottles have sediments? Have you ever cross contaminated them?

Yes I want to see your water report.

I just bought them 3 months ago. It is possible i may have dropped a dribble of part b or part a into the opposite at some point tho. But the same thing happened in my old soil grows with just using sensi ph perfect bloom.

There is some salt build up on part B at the cap. But, not inside it

I will post water report in a minute