I need help with my three first echeverias

Hello everyone,

after reading through this subbreddit I decided to post on here as well.

I am a new plant owner. I did a lot of research and thought I found the matching plants. However, since last winter, it has been going downhill.

I have four echeverias in total but only three have problems. I added pictures as well. I bought all of them aroung July to August 2025. Since they were growing a lot in width I decided to repot them around October. They live on a south facing window bord with the heater underneath. I kept them there in the winter as well since they would get a lot less light otherwise. The might have gotten warm from the bottom.

I guess i will just describe the problems.

1. My echerveria agavoides ebony had developed two babies underneath the bottom leaves. I decided to remove them and ater leaving them to dry to build calusses I put them in their own pots. They only ever develop very small white roots but do not stick to the soil in their pots? It cannot be that bad since one of them started to get colours on its tips (picture 8). The mother plant is the bigger problem (picture 1-3). After removien the babies it had spaces underneath the leaves. I figured it would settle itself in its new pot. It did not do that. The leafes started growing normally and the point downmwards since the plant pushes itself on its bottom leaves. I did not think it was etolieated because the stemm did not grow in height. The roots are directly in the middle at the bottom leaves. Does anyone have an idea as to what to do? I am kind of scared of trying to behead the plant to save the top?

2. My echeveria chihuahuaensis was growing well and therefore was repotted. Everxthing seemed fine until a couple of weeks ago. Suddenly it started reabsorbing/developing mushy leaves. I thought it was fine at first since I read that the bottom leaves will do that every once in a while. However, it got significantly worse and today I wanted to move it and now healthy looking leaves are falling of. You can see the current status in the picture (picture 4-6). It was once nearly too big for this pot, as in I already bought new pots. I watered it for the first time 2 weeks ago since it leaves never looked wrinkly before. That is when it got really bad.

3. The third one (picture 7) I bought at Ikea as a baby. It has been growing the best out of all of them but during repotting I always left the original root ball (?) and soil in the new pot as well. This is the only one that ever got wrinkly. I watered it then only. After the last watering the top layer of the soil developed white fluff. I have removed that and plan to put it in new soil. Should I put the roots under running water to remove any possible white stuff? Also if anyony has any idea what kind it is?

I have a fourth one that is not growing bigger but also does not show any signs of anything else. That is the only one I did not repot since I did not have a big enough underpot. I know that keeping the soil it came in is bad but after the experiences with the others I am scared to repot it.

I have added a picture of my soil mix ( pic9). It had echeverias on the cover so I thought it would be fine.

I would be very happy about any tips and ideas for my plants. I know this is a long post, so even if it is only for one of the plants , it would be very helpful.

Thank you in advance,

H