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.
@ggc1962 your Temps are good,
Bobbydigital beat me to the VPD chart so I echo his advice here.
That’s a medium I don’t have experience with, but if your able to check your roots then do to ensure there is no start of root issues.
What’s your nutrient line?
I think 1200ppm is good for now although you could probably push it a little harder.
The curl is very minor but good to keep on top of it and start figuring it out now.
As you can see ppm range is debatable, above you seen chem gro’ s recommended ranges (with cal mag keep in mind)
And below you see fox farms and General. Hydroponics
@BobbyDigital set humidier to 50% see how it goes for a cpl days. Thnx for the chart. @Nicky roots look good,
I am using AN jungle juice(used it many times with no issues) , Yea, curl is minor, just never seen this type of curl b4. Tryin to stay on top of it. I have best results in lava rock, kinda old school but things seem to stay stable
