Hi! I have had some 15 coffee seedlings for a year and this spring I repotted them each to a separate pot. The thing is, I have always had problems with it and I feel like they're all slowly dying. When I got it, it was healthy and green but since then the leaves have been consistently getting brown at the tips and that spreads until they die. Some of the smaller one have dead tops. It's in a peat based soil which I think might be the problem. I live in Croatia and we have hard water so the soil might have too much of the soluble salts. I was thinking of repotting again to a bark based soil which provides ample drainage. it's meant for orchids though, do you think that would fix the problem? I also think it might be N deficiency since I barely fertilized it since I got it. I really dont know what I'm doing here but I dont want it to die, so I would appreciate all your help very much. Nothing I do seems to be working. I thought that repotting will help but it didnt. Half of them are in SIP pots. I dont think that is helping if its soluble salts, but I thought it might help me with managing watering.

This is what it looked like few months after I got it.