Leaf turning yellow with brown dots

[Roocky]

hello growers
Im growin a kush marijuana and it is 5 weeks old. It looks healthy but today i noticed that one of the lower leafs turing yellow witj brown dots
I feed it it every 3 days with 7-7-7 ( it is the only sulotion i could find )
I never tested the ph of the soil
Here is a photo of it




What can i do about it ?

 

[Dr.Pecker]

You might need to transplant it, when was the last time you potted up? I don't see any perlite in your soil. You should have more drainage. Ph is everything, you should be adjusting your solution to the requirements of the medium.

 

[Roocky]

I moved it from the cup at week 3 (18 days ago) should i be moving it again ?
What is perlite for i never heared about it
And how can i have more drainage
Thank you

 

[Dr.Pecker]

I moved it from the cup at week 3 (18 days ago) should i be moving it again ?
What is perlite for i never heared about it
And how can i have more drainage
Thank you

You might not need to transplant just yet, if it gets worse then do it. just make sure when you do transplant you use something like this in your soil.
a form of obsidian characterized by spherlulites formed by cracking of the volcanic glass during cooling, used as insulation or in plant growth media.

What it does is allow space for microbe colonization and promotes drainage when mixed with the soil. You should use a mask when you work with this stuff.

 

[Roocky]

Thank you

 

[Dr.Pecker]

What kind of soil are you using? You should be ph adjusting your nutrient solution or go all organic.

 

[Novice man]

Am not z pro grower my self but if you go your local hydro shop pick a canna leaf book up and tells you possible problems.

Here is mine if you can see not the best all I had in my phone.