strange leaf deficiency....

[x00m]

Hello,

can anyone please identify the issue with this plant? this is a single sample from the upper half of the plant.. some of the very lower leaves are the same... ppm is 590.

540ppm on grow A/B and 50ppm on calmag. this is like month 2 on grow. no flowering signs yet.

growing hydro, with led lights at grow mode on flower mode off, pH stable at 5.8 at all times. grow area temp is stable at 22.5 degrees C.

one thing i do not have is a monkey fan for air circulation.. but i do have passive conduit to the outside for fresh air.. as the carbon filters sucks air out. The passive conduit should drive fresh air in due to negative pressure.

Problem: Central darkening along some leaves

Medium/grow method: Hydro

Feed: and supplements used: Dutch Pro Grow A/B, Dutch Pro CalMag, Hydroguard

water source: Tap softwater

Strain/age: Auto Speed Bud over 2 months old

light used: LED with grow mode ON and flower mode O

Climate: Air temp stable at 22.5c water temp stable at 20c

Additional info: the problems started when i didnt change the reservoir for over 3 weeks. By this point. the plant had stopped growing... i have now since changed the water for fresh... the plant grows again.. but its developing weird symptoms like this...

 

[Arthur]

https://www.autoflower.org/threads/...ill-out-first-with-the-data-that-matta.45991/

Much more info need for anything other than a guess.
At the top of the infirmary there is this link. Copy and paste, fill it in and you'll get plenty of help.

 

[x00m]

https://www.autoflower.org/threads/...ill-out-first-with-the-data-that-matta.45991/

Much more info need for anything other than a guess.
At the top of the infirmary there is this link. Copy and paste, fill it in and you'll get plenty of help.

okay done. thanks.

 

[x00m]

Could this be potassium deficiency? or phosphorus?

 

[x00m]

right so no one literally knows what the problem is? niceeeeeeeeeeeeeeeeee

 

[x00m]

the plant is going on 3rd month without ANY signs of flowering. not sure what is going on......

 

[Frank M]

I have no experience with hydro tried it once epic fail
but reading did you get root rot from not changing the reservoir for 3 weeks.
My leaves kind of looked like that with the rot I had.

 

[Proph]

This looks like a phosphorus issue.. But that's a guess.. No telling what the issue is if you didn't change the res for 3 weeks.. It's most likey a combination of things at this point. If you are on month 3 of growing auto, it's not an auto.. Those are bad genetics.. Autos are harvested in month 3.. If you change the light cycle to 12/12 for a week or so Im sure it will start to flower. But as for the issue, it's too hard to tell at this point. You need to be addressing issues at the very first sign of them.. The pic of that leaf shows that this has been going on for a while now. I would need to see a pic of the whole plant before I could advise on a possible next step.

 

[x00m]

I have no experience with hydro tried it once epic fail
but reading did you get root rot from not changing the reservoir for 3 weeks.
My leaves kind of looked like that with the rot I had.

ive got hydroguard in there. surely even with 3 weeks. Hydroguard would do its job? and the roots look fine to me... they are stained with Dutch Pro Multi Total.. but no rot.

 

[x00m]

This looks like a phosphorus issue.. But that's a guess.. No telling what the issue is if you didn't change the res for 3 weeks.. It's most likey a combination of things at this point. If you are on month 3 of growing auto, it's not an auto.. Those are bad genetics.. Autos are harvested in month 3.. If you change the light cycle to 12/12 for a week or so Im sure it will start to flower. But as for the issue, it's too hard to tell at this point. You need to be addressing issues at the very first sign of them.. The pic of that leaf shows that this has been going on for a while now. I would need to see a pic of the whole plant before I could advise on a possible next step.

its meant to be the Auto speed bud.. supposed to flower in 45 days... strange how can they mess up an order that simple.

ill post of the whole plant picture later on so you can see wht the plant looks like.