Started LST but now plants look a bit sick?

Hi there, First of all,It will be alittle bit difficult to do LST in small fabric pot.You plant isn’t that young to perform LST.She is good to go.The main purpose of LST is to pull down the main stem ,not to grow vertically and to spread the branches as many as you can.And it’s normal the some of the leaves might touch the ground and some might be damaged.Those problems you are facing now is not from LST.It could be from others.Like your temp is 31C.Sure you will see curling leaves and I see your pH and ppm isn’t in the proper range for this age.If you are growing in soil, always maintain your pH around 6.5 and your ppm about 1000 is too much for this age.Soil don’t need much.Save your nute for later.Also don’t spray on leaves if not necessary.You don’t want to get unnecessary problems from spraying leaves.Correct those and your plants will be fined.Happy growing... ✌️