leaves curling down

Hey (Stage: early vegetative) I have issues with the lower leaves(older) and its getting yellow recently some dark yellow or brown dots are appearing and its getting more and more, leaves are curling down and soft, do you know whats the reason? Thanks @Emilya

So i started some new plants a few weeks ago and I'm having the same problem that i had with my grow a month or 2 back. Bottom leaves on all my plants start to slowly curl down, some of them twisting. And than i notice it works the way up. I will mention that it contiues to grow, but very...

I'm new to this forum and I'm a beginner. I started with hydroponic. I got two plants, both feeding from the same containers, same light, same nutrient. One is doing really well, but the other have the bottom leaves sagging down. I would appreciate some advice. thanks PS I uploaded two pictures...