Over.

I will add that they're also not getting enough sun, which contributes further to overwatering (not drying out).

Your glass setup is not acceptable for succulents though terrariums can look wonderful for a little while. Without drainage holes, you cannot give it what it needs--to dry out. If you haven't watered and your soil is still this wet, then they're in trouble.

You might benefit from repotting into something that is 90% chunky, like gravel, grit or perlite, etc.

To give you an idea, this is the "soil" I use. If you do a search for "gritty mix" you should find tons of info that Al and others have posted in the Container Gardening forum.

Good luck!

First thing you can do is take them out immediately; out of the glass container, and out of the soil that's there. Shake off (gently) or even wash off all the soil from the root ball and inspect the roots. See if there are any blackish, soft roots - if yes, cut them off. Otherwise, just let plants sit on some newspaper or kitchen towels to dry out. In the meantime, get some containers with drainage holes. Perlite and some grit would be great. Maybe the smaller stones would work? - wash them and they may be used in new mix. I am not sure, since it's hard to tell size from your photos.

While it may not be best time to re-pot, it should be better than keeping them in terrarium-style container, and in soggy soil.

What is your zone/general location? How many plants do you have? Are you able to get some ingredients like perlite, or scoria or pumice?

I'm in Albany N.Y. I have 10 succulents and one cacti. I don't know where I would get ingredients like that. They might have them at the Nursery near me. I'm going to go check tomorrow. All of my plants could fit in the palm of my hand, the biggest is maybe three inches in diameter, and my tallest is about three inches tall.

Just Unpotted them. None of the roots are black and the soil is dry. I will get pots tomorrow.

Brian

If nothing else, you should get perlite very easily (sold even in Wallmart, HD, Lowe's).

It would probably help if you sift it thru kitchen sieve (get one very cheep in dollar store) since there will be some very small particles/dust (you may want to use mask). I usually rinse it too, and then mix at least 50% of total volume with your C&S soil (you can use more perlite). Use this mix, it will have better drainage. In the meantime, you can look for some grit or other ingredients.

I buy chicken grit from farm supply store, in 50lb bags. You may not need that much. Just about all of my succulents are in mix without any soil.

With the lights, you should keep them quite close and directed at the plants. Just to be on safe side (I don't know what your grow light is like), lower them gradually. They could be as close as few inches, but just like exposing plants to full sun - you may want to do it in steps. I leave supplemental lights on from 10 to 14hrs, depending on how much natural light they get. I am in z5, Ontario, Canada. I believe your winters are quite cold - and dark? - too (there is young member from Albany on this forum and he comments about cold in Albany).

Rina

edited to add: here is interesting thread about using supplemental lights; ewwmayo has posted Excellent photos and description (and some calculations) of his set-up; he is in Ont, Canada too (little warmer than me:) -

-winter set-up for succulents-