I'm growing purple kush under a 250 watt hps light. Around 2 days ago the top leaves stared curling up, and the bottom one's dropping down. I'm wondering if anyone has encountered this problem? The leaves have a slight discoloration on top. I moved the light up to see if it would help and reduced my fan from blowing on it as much. The plant is growing on pro soil with no nutrients added.
I'd say tin foil causing hot spots from the hps. Get proper mylar/panda film and raise your light a bit Sent from my SM-G900H using Grasscity Forum mobile app
could be N toxicity but it doesnt look too severe so i wouldnt do anything just yet other then wait. what is this pro soil you are using?