Yes, it seems to be a Bluebird, and I think I see some sunburn there but I'm not sure. It would be better outdoors now that summer is here. How often do you water it? Could we see a close-up of the spots, please, Signe?

Hi both. Thank you very much for responding to my request. I have had the plant for 2 years and I water approximately every 8-10 days (in winter approximately every two weeks).

The potting mix is gritty and specifically recommended for succulents bought in the botanic garden here in Copenhagen. I just repotted using the same mix as last year however I think it's seems to be a little more dark than it use to be.

But the reason I just changed the soil was that the plant didn't look so happy and the soil seemed very dry and sandy. When I repotted the roots looked fine - no signs of rot. The plant sits on a south facing window sill - but spring hasn't been very sunny until now, so I don't think the spots have been caused by sunburn.

Here are a few closeups and thanks again for responding :-)

I made a baby from the plant last year and that one thrives very well :-)

That 'cracking' on the leaf looks like oedema (edema) - roots taking in more water than plant can transpire, and the cells stretch and collapse. It is not a disease and it doesn't spread, it is physiological disorder. Some plants are more prone to it than other. It could show up as small dot-like brownish spots, or bigger & corky-looking as on your plant. Using well draining mix will help to limit over-watering; good light (IMO - preferably outdoors if possible), good air circulation (if indoors, small fan may help), decreased humidity (not easy in humid climates! :) and not over fertilizing all help.

Yellowing leaves are often sign of over-watering, but could be also from under-watering. You mentioned that they are also softer - but maybe it is just since plant was just repotted and may not have 'recovered'. You also say there seems to be sand in the mix - maybe you can post a photo of it? It could be amended to get better drainage.

Hi Rina. Thanks for your very informing response. I actually have a sample of both the soil from last year and the new soil. And I am surprised that the store told me it was exactly the same mix. The two samples looks quite different to me by thorough inspection - and in fact I already made a point about this when I bought the new soil. Maybe I should repot again to make sure it has good drainage. The only thing is that the problem already started with the first soil. But as I understand by your comment the edema is not something that will kill the plant?

I also trimmed the roots when repotting - do you think it will stress the plant if I do another repot?

Here are photos of first the old soil and then the new :-)

I can see couple of thing with the soils; BUT please remember that I am judging just from photos (and sometimes, they could be bit misleading):

1. Old mix seems to have lots of sand and to me, I looks too fine. The bark (at least I think the large chunks are bark) looks too large to de of any benefit. I see hardly any perlite (white pieces) unless there is some pumice. To me, it looks too much variation in size of different substrate particles.

2. Much more even and finer - but not necessarily good for succulents. I can hardly see any bark - maybe there is more but too fine; there is probably sand (it blend better since everything is small/smaller); and I really do not see any perlite (or pumice?) It looks like there is some grit in new mix, but if that's what it is, perhaps too little.

These mixes may work well for the Botanic garden: if they grow in containers or large boxes or even ground. Plants kept in the greenhouse will have much better controlled conditions. All are taken care of by experienced ppl. Could be more difficult to replicate at home.

Looking at new mix, you could improve it by using about half (yes, 50%) of total volume of perlite. It is easy to get and inexpensive. Sifting or rinsing would help, as there is always some dust and very small particles. I think even first mix had similar issues - too water retaining.

Where do you keep your plants - indoors or out?

Edema will not kill your plant, it makes some leaves unsightly and they could be removed if it bothers you. But improving conditions as I suggested may help in having much less of it.

Hi Rina. I am so happy I found this forum two years ago when I decided to grow an indoor garden (unfortunately I live in an apartment). I have learned so much from some of you guys who generously give expert advice. So thank you once again for your feedback. I will go hunting for perlite which is actually not so easy to find here in Copenhagen :-)

And thanks to Maguerite and Greenclaws too.. :-)