Leaves turning colour and getting crispy

[Bucky008]

Ph 6.5-6.6, fox farm nutes lights on temp 21c lights off temp 16c

 

[Firsttimegrower2020]

Hey buddy welcome to 420 you will get the best of the best help here and everyone is really friendly. Looks like heat stress and nut burn how old is your plant is it an autoflower or photo

 

[Bucky008]

Plants are about 3 weeks now. They are photo and veging under t5. Plants are 4 inches under the light.