Help!! Greenhouse problem.

[Greenhousegrower]

Hallo everyone,
I'm doing my first grow in my green house. But my seedling have totally stopped growing and leaves are getting yellow.

What should I do, the other plants in the green house are doing just fine.
Could it be bugs, heat, nut, to less sun etc.

I live in North Europe.

The strains are LSD & Meth.

 

[chemistry]

Whats in your medium that makes your perlite stain? Or some thing leaching from the cardboard maybe.

 

[One drop]

The Coco stains the perlite I get that in my grows are you feeding them any nutes .?

 

[Greenhousegrower]

The Coco stains the perlite I get that in my grows are you feeding them any nutes .?

I tried to feed them some very weak nuts. But it dose not seem to help.
I don't know if it the pots that are to good at keeping them wet they take so long time to dry out

 

[Greenhousegrower]

Whats in your medium that makes your perlite stain? Or some thing leaching from the cardboard maybe.

It's just pure coco and perlite I don't know why it is stained.

 

[One drop]

Do you have a PH Meyer and TDS meter so you know where your at with the feed know the pH and ppm of the feed is most important to grow well .

 

[Greenhousegrower]

Do you have a PH Meyer and TDS meter so you know where your at with the feed know the pH and ppm of the feed is most important to grow well .

PH in the water is 7-7,5. Run of about the same.

 

[Newber]

PH in the water is 7-7,5. Run of about the same.

that is your problem, adjust PH

 

[Greenhousegrower]

that is your problem, adjust PH

What should it become

 

[Newber]

coco 5.8, soil 6.5

 

[Newber]

good luck

 

[MIGrampaUSA]

Adding pictures for clarity ...

Nutrient uptake chart for hydro:

You would want to pH your nutrient solution to 5.8 +/- 3

In soil, it's a bit different ... your soil should have a pH of 6.5 +3/-2 for best results.