Do you have any pictures?

I think you may have found the problem not enough light. Many of my succulents are under grow lights year round, since I don't have enough space outside. I recently upgraded to better grow lights and the plants are much happier. There colour is more like they are under sunlight. Proper lighting is a major obstacle that most people don't fully understand.

I have to ask about your soil. You said this is third one you are on. Have you had all three in the same type of potting mix? Life starts in the soil. Not every succulent likes the same succulent potting blend. What type of mix do you use?

I haven't used the same mix for all the Seyrigia plants I tried to grow. Previous Seyrigia were in a home made gritty mix. I can't remember the exact proportions of what I put in the mix. A while ago I thought maybe the stems were dying back too quickly because the plant was too dry too long between watering. I put the plant in the picture in a mix that still had a lot of perlite and grit but more potting soil than my other gritty mixes I've used for my other plants. Last spring, summer, and fall I kept a closer eye on this plant and watered it more regularly so it didn't sit dried out for a long time. However, that didn't really improve the growth of new stems.

For years I've been thinking of getting grow lights for the winter months but hesitated because of the cost for a hobby. However, last winter I lost more plants than usual so I was more determined to do something for this winter. After seeing the definite improvement of the Seyrigia for the first time and a few other cacti and succulents currently flowering, all indicating better health, I think I regret not buying lights years ago.

I'm a bit reluctant to post pics of my plants. They don't all look great. Over the years there have been various problems that have left them looking less than ideal. I'm sure everyone can see a few issues in my pic above but I shared the pic anyway because we do love pics.