I noticed these leaves starting to curl on the edges of the leaves yesterday when I got home. Not sure if its light burn or high nute issue. I had 2 issues going on when I got home. Around 3 weeks in to flower. First was nutes had shot up to 1740ppms so i dropped it down to 1200 ppms. 2nd, before i left I turned lights up a 1/4 turn. running a hlg550v2, 2100a driver. 28 inches from canopy in a 4x4 tent. I am only seeing this on some of the top leaves thats making me think its the start of light burn. I did turn the lights back down until i can figure it out.
Other than that, the plant is looking great