Trying to figure out why plant leaves are curling

[Surplus]

Grown in WP420 with added worm castings & hen manure pellets. Watered the same as the other 3, its the only one looking frail... What kind of things might cause this? no nutrients yet, they haven't even really taken all 10 gallons of amended soil so no nutes. Watered every day / second day because of the hot weather right now in Ontario. Genetics by Weathed Canabis Seeds "Timewarp Dream". I'm guessing at this point the plant must be bad or diseased or is this nutrient distress?

 

[Galgrows]

Chicken compost can be super hot on roots even composted in large amount. This looks like nute caused curl to me. Some can take it like your others do but this one seems to be really sensitive to the soil mix.

 

[Surplus]

Chicken compost can be super hot on roots even composted in large amount. This looks like nute caused curl to me. Some can take it like your others do but this one seems to be really sensitive to the soil mix.

Thank you for the reply, I'll try flushing the soil out, i didn't think i over did it but maybe i did... all advice welcome :)