Your gonna get buncha answers.im no pro-but my nute burn usually starts@tips&edges.i just burn 1my girls yesterday.woke up2it.i know what i did tho.so,i was gonna say maybe overwatering? Is it indoor or out? Have u done something diff. Recently?
if u havnt watered in awhile,hows it nute burned?so lets say it is nute burned-are you really just gonna sit there & watch it?seeing how you already know iots not o/waterd Why wouldnt you flush it or something?im only on my 3rd grow so im no expert.ill back out yer thread bro!l8r.