I know it may not be anything. But I wanted to confirm or rule out any problems. This plant is at 3 weeks. And the leaves are starting to crinkle upwards at the tips no yellowing or spotting. Just wanted to make sure this was ok and if not what can be causing this? Over watering. Stress? Heat? Ph?
Overwatering is my guess. How often do you water it? Try not watering until it is light weight form being dry. Not until she is limp though. See if that helps.
3 Weeks from seed? Clone? Need info on your set up. With only two sets of leaves, there isnt alot to base it on. But I'd guess overwatering/heat as well. You don't want your young seedling soaking in water, as it will compromise its delicate root system.