Can anyone tell me what this is?

[Tdh101jr]

Hey guys so out of the order i placed for 420 3 critical purple kush and 3 auto og kush rolex i asked if they were mature well all cpk germed and none the auto did except 1 that didnt even get 2 true leafs. But i just put 2 that germed in soil and ive had this one going for about 2 weeks now vut whats on the edges it the soil to hot with nuits or something i think its severe burn idk though havent seen nuit burn to this exstent lol.

[oldjarhead100]

yes soil is to hot what did you use I like roots organic original to start my plants

[Tdh101jr]

I believe its the same soil i used from last grow that i put a lil organic fertilizer in i didnt mean to put the seeds in that but instead this potting mix with no nuits.