What's wrong with these plants?

If u have a tiny space training would be a good thing for you to do so that ur plant gets more light. I would also check ur ph and make sure ur giving the right food in the right amounts

Hi there Pure Mello, i have to disagree with my esteemed colleagues on this one. Here i see two problems. First the plant is getting too much N , this you can see from the shiny & too green aspect of the leafs. Second i see a magnesium deficiency which is due in part actually from too much light. So it's easy to fix, reduce the N of your NPK feed, cut a couple of hours off of the light schedule and add cal mag to your feeding schedule. The affected leafs will not recover but the plant should recover quite quickly actually. You can make it recover quicker if you make a cal mag spray and spray before lights on twice a week for 10 days or so. Hope this helps ! 🚀

They need light. Cal mag and potassium. Make sure you have a good course perlite mix in transplant substrate as well. Good luck and happy growing 🌱

They appear to be getting/have got insufficient light for sure and hungry it looks like maybe root bound.