Hemp seedlings showing brown spots

[HappyHempFarmer]

Hi Everyone,

I have a few hemp seedlings that are showing some signs of distress. To be more specific they are developing small brown spots on the interior of the leaves. I am not 100% sure of the cause. pH issues perhaps. Any input from other members would be greatly appreciated. See pictures below.

Thanks in advance for your help!

 

[HappyHempFarmer]

Additional Images...

Additional Images...

Here are some additional images of the plants.

 

[Flyingteapot]

Are you feeding them what is the ph and what medium are they in