What could be causing this 5 week old Northern Light to start curling up and drying at the tips of upper leaves.ph is good, not over watered.Could it be light burn or heat stress??
Maybe... Don't worry about it...besides that, your plant looks great. It will be fine as long as it doesn't get worse.
I agree, I don't see any problem with those plants. When leaves do curl upwards, the plant is trying to retain moisture. It is usually caused by too much heat or too much air blowing on them. Make a few adjustments if necessary, and keep an eye on them. No reason to be concerned yet.