Possible Potassium deficiency?

[TangieD]

Hi,
Sour Diesel on week 5 growing in Roots Organic soil. Only been on 6.2ph water until 3 days so as I thought they were looking ready for feeding.
I have had major issues with Nitrogen levels in the soil (no added nutrients) it killed 2 of the 4 plants. Attached pics hopefully show the issue of the deficiencies or overloads.
Autopots
Temp;75
Humidity;63
I am hoping that MC @ 400ppm will assist in correcting the issue?


thanks TangieD

 

[TangieD]

I have upped the ppm to 500 in hope that it corrects the issue.

Anyone help me with an informed opinion please?

I’m going to keep moving forward but would love some help.
thanks

 

[TangieD]

Still having issues …errr… about 3 weeks later. She is the back right plant, grown some that’s forsure.
Hoping she will live long anough to finish unless there is any idea.
temp 73f
RH 51%
ph 6.3 just upped today to 6.7 to assist the calcium uptake I hope.
currently feeding a total of 820ppm in Rez of Autopot system
5liters 3ml cal/mag and 6gm Megacrop.
The younger plants doing well with the youngest on it’s own Re.

This is my first Auto grow so she has been used as a learning curve.

 

[Del boy]

Still having issues …errr… about 3 weeks later. She is the back right plant, grown some that’s forsure.
Hoping she will live long anough to finish unless there is any idea.
temp 73f
RH 51%
ph 6.3 just upped today to 6.7 to assist the calcium uptake I hope.
currently feeding a total of 820ppm in Rez of Autopot system
5liters 3ml cal/mag and 6gm Megacrop.
The younger plants doing well with the youngest on it’s own Re.

This is my first Auto grow so she has been used as a learning curve.

View attachment 1440766

my advice tag Mañ'O'Green he use mega crop and he nows his stuff he would be able to help you more then most can :smoking:

 

[TangieD]

Thanks mate will do.
Here is an updated photo, @Mañ'O'Green hoping you might be able to advise if possible.
Also LED light running 600-800ppfd
And Roots Organic original soil.
thanks TD

 

[Mañ'O'Green]

Let me see if I got this right? Organic Soil - Autopots - Mega Crop + Cal Mag.

Autopots are hydroponics and soil does not work well in hydroponics.

The soil would have enough calcium from Dolomite lime for the entire grow, MC has high calcium and you add more calcium and your tap water has calcium. You might have too much in the pot now and there is no way to get it out. You are in a major lock out. Just top water with PH 6.4 water for a couple of waterings to a good run-off. Do not try to flush soil.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

 

[TangieD]

Let me see if I got this right? Organic Soil - Autopots - Mega Crop + Cal Mag.

Autopots are hydroponics and soil does not work well in hydroponics.

The soil would have enough calcium from Dolomite lime for the entire grow, MC has high calcium and you add more calcium and your tap water has calcium. You might have too much in the pot now and there is no way to get it out. You are in a major lock out. Just top water with PH 6.4 water for a couple of waterings to a good run-off. Do not try to flush soil.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

Thanks for the quick reply It’s much appreciate.

This started happening at week 3 with just tap water ph’d to 6.3
If that’s the case of lockout the plant on back left will be in the same boat. Oh well live and learn. Reason I added cal mag is all plants have showed calcium deficiency at week 4 using this soil with just water. To be fair I have thrown the balance way out trying to correct it since 3 weeks ago.

Photo not super clear but you can see lower leaves showing deficiency?

 

[Mañ'O'Green]

Thanks for the quick reply It’s much appreciate. View attachment 1440789This started happening at week 3 with just tap water ph’d to 6.3
If that’s the case of lockout the plant on back left will be in the same boat. Oh well live and learn. Reason I added cal mag is all plants have showed calcium deficiency at week 4 using this soil with just water. To be fair I have thrown the balance way out trying to correct it since 3 weeks ago.

Photo not super clear but you can see lower leaves showing deficiency?

What is the PPM of your tap water?

 

[TangieD]

What is the PPM of your tap water?

Tap water is only 49ppm

 

[Mañ'O'Green]

Tap water is only 49ppm

Not the water. next time you start new plants tag me into the thread.