Yellowing tips on my fav girl, really droopy young plant too. Just flushed before pic, soil dry. Sent from my SM-G530T1 using Grasscity Forum mobile app
More info. What are you feeding them? What kind of light? What's the ph of the water/feed before you pour? Is there good circulation and Air transfer? What's the temps when light are on and off? What's the humidity?
Also watering schedule. They look droopy which suggests a problem in the soil or roots. More information please LED indoor - https://forum.grasscity.com/index.php?/topic/1394646-Pure-AK-barebulb-cfls
the soil looks dry thts probably why there drooping. yellowing tips i had same probs was a calmag issue for me but seems to be ok now. could be a deficiency
New plant. Old one is doing much better in new pot, thank you Sent from my SM-G530T1 using Grasscity Forum mobile app
My guess is nitrogen deficiency. Magnesium deficiency looks more like rust spots. LED indoor - https://forum.grasscity.com/index.php?/topic/1394646-Pure-AK-barebulb-cfls
Low N causes yellowing. Wrong ph will also turn leaves yellow and or just have em die. Keep the above chart handy and this.