plants keep dying on me

[Gman1887]

I need help here, Been growing a fair while but have hit a brick wall. I think is my water supply and have sent it off for analysis. Anyone having this issue?

 

[Clstr8]

need info on lights, soil or nutrients being used.

 

[jdog127]

Yeah we need a run down of your entire set up to be able to help. whats you're feeding schedule how often you're feeding what is your ppm what is your PH. What's your humidity what's your temperatures. What is your grow medium. Pictures are also a must.

 

[Gman1887]

Ok, I am presently in autopots with coco/perlite 70/30. I have 10x 600 HPS lights , temps are perfect and so is humidity
Ive just gone over to R/O water using Ferro osmosis coco nutes as I think its my water is not good. When they where pips I gave them to another grower to raise. We used my water to avoid any future shocks. After 3 weeks or so he thought things weren't right so he used his water on half. His water plants left my water plants behind so we thought we had found the problem.
We then brought the best of the plants to my setup and imported his water.. for a week or so all looked good then they died off and now I don't know.
He carried on with some of this batch and he doesn't think there going to make it.

 

[Gman1887]

My feed levels are Ec - .8 and ph is 5.8

 

[steve870]

how do they die off? they whilting?

 

[Gman1887]

They produce green shoots but cannot hold on to the colour. so fan leaves are tiger stripes then die off completely
I'll take some pics and posts them later today

 

[steve870]

i would check my nutes for a micro element thats missing or that is there in small quantity.Yes Pictures would help

 

[Gman1887]

Ok here's are some pics. This is typical of my last 4 grow attempts. I have tried all types of nutrients. The only one that nearly does it is Formulex. But as soon as I go on to A and B feeds this is what happens, The best reasoning I have come up with is that my water is causing it. I haven't tried a grow with RO and Specific nutrients from start yet. That will be my next move.

 

[spek9]

Please, for the love of all things good, when you post a hundred pictures, select the thumbnail option so we don't have to scroll for an hour to get past them

 

[xtsho]

It looks like green algae growing on the perlite. If it is then you are severely overwatering those plants. In order for algae to grow you would have to keep that plant constantly soaked which can lead to root issues, rot, and dead plants.

 

[Gman1887]

These plants have been in veg for 6 weeks or more. I’m using Autopot so with constant air lines. The reason they’re showing some algae is because they have lost most of their canopy. The coco mix is not saturated

 

[70's natureboy]

As I was scroling past all that green, all I could think of was over-watered plants. Lights are good, nutes and ph are perfect, It has to be the autopots that I know nothing about. I didn't notice the temps, possible cold?

edit I'm assuming the nutes are perfect. I have no idea how complete they are.

 

[spek9]

I didn't notice the temps, possible cold?

I'd have to say no regarding cold temps being the problem. Typically, you'd see the stems taking on a dark colour (purple-redish) if temps are cold.

I don't see any indication of that within the pics posted by OP.

 

[Gman1887]

Thanks for replying. Didn’t mean to post all those pics. Temps are perfect I will shut off feed supply for a couple of days see if they respond. Problem is always leaves don’t hold onto their colour. New growth is fine.

 

[Corso312]

Looks like a standard potassium defeciency to me.

Have you tried soil instead of Coco? It's far more forgiving and you don't have to worry about the pH or licking out NPK .

 

[Gman1887]

Im looking into that now. I’m seriously thinking about upgrading pot size to 25L and growing in Sohum living soil. Any one doing this?

 

[Never Known]

It looks like green algae growing on the perlite. If it is then you are severely overwatering those plants. In order for algae to grow you would have to keep that plant constantly soaked which can lead to root issues, rot, and dead plants.

Sorry to but in but don’t for coco don’t you have to keep the medium damp? I’ve been watering everyday. Don’t want to run into root problems later on though.

 

[Never Known]

I'd have to say no regarding cold temps being the problem. Typically, you'd see the stems taking on a dark colour (purple-redish) if temps are cold.

I don't see any indication of that within the pics posted by OP.

Is there any way to come back from purple stems and branches?

 

[Dontjudgeme]

I need help here, Been growing a fair while but have hit a brick wall. I think is my water supply and have sent it off for analysis. Anyone having this issue?

You’re growing in coco and using RO water with no calmag. Double whammy.