Curled leaves

Magnesium deficiencies will cause curled leaf tips like you have.............plants also look hungry in general.

The taco looking leaves and the yellow starting to appear at the tips looks like light/heat stress. During veg, I run my lights around 30" over plants and between 30%-40% intensity. I run a few different manufacturers with different wattage in different tents but all of them i run at the same settings. I save the higher intensity for the middle of flower. Lowering light intensity and/or moving light away from plant will also help decrease temps. I would start feeding nitrogen, if you are then up the dose a little.

Hey! Leaf tips curling upwards is often from heat or light stress check your light distance and temps. Low humidity can also cause moisture loss. Other possible causes: Nutrient issues (excess nitrogen or salt buildup) Watering problems (over/underwatering) Poor airflow Share more details about your setup for a clearer diagnosis. Hope this helps! 🌱

Looks like a little bit of overwater and the humidity and temp is off probs. Also the ppant could use some nitrogen it's very light color

Can be from Light, Heat or RH, get them in line and should straighten out. Light = DLI or 35-40 18/6 or 12/12 is standred cycles. Heat = 18c-26c RH = 40-70% in veg, 40-60% in flower

Keep temp in day 70-80°F.And bit cooler at night

I think it could be too much light intensity. How much PAR/PPFD are you giving this plant? In this stage no more than 400 is plenty enough light. I usually try to set my light at about 350 PAR/PPFD in this stage of life. As the plant gets older with more veg time then you could be around 400-600.

Cause: elevated temperature, lower the temperature.Good luck