what is this discoloration? plants 1 month old under spiderfarm 4000, foxfarm hppy frog soil, balanced feeding with excellent formula

[sativarick]

what is this discoloration? plants 1 month old under spiderfarm 4000, foxfarm ha

ppy frog soil, balanced feeding with complete formula

 

[Phyto]

A picture of the whole plant would be helpful. Is it just that leaf or many? If it’s just one, don’t sweat it.

 

[sativarick]

trouble in the future?

 

[Phyto]

Possibly a bit overwatered.

 

[HerbalEdu]

you should transplant, you'r just stunting them at this point keeping them in small cups

 

[hygrow]

That might be rust, remove all affected leaves, no foliar, and reduce humidity to 60, increase air circulation.

Might be nutes but if one leave, follow above.