The Semp (which is cold-hardy and, in fact, needs the cold) is unsuitable to grow with the other three (I can't see your pics). I'd guess you'd want to grow that one in the ground. Those other three, even in GA you'll want to have them in the house (but at a window / in a conservatory) - they should show signs of growing soon (they're cooler-weather growers).

The other three - you might have sun-burned them (you may have sunburned the Semp, too, but it reacts like the other three). It looks ugly, but it isn't fatal (and the plants will grow out of it).

Extreme changes of environment should be avoided. I can tell you about sunburn on plants....and I know better, but I was, as you were, occupied with other things.

Bad news:

#1 Sempervivum: Dead. Sunburned and cooked. Waterlogged rot down.
#2 XSedeveria: almost dead. Sunburn. Marked resorption of water in leaves. Waterlogged root death.
#3 Haworthia: looks surprisingly intact. Desiccated lower leaves is normal. Just recycling materials.
#4 Echeveria purpurosum: Sunburn. The critical growth point at the top looks dead.The plant is dying a slow death. Very poor soil and culture.

What to do? Start over. Research gritty soil mixes here. That stuff you're growing in now looks like pure peat which is pure poison to succulents. The mix should be 75% or more inert materials in the 1/8 to 3/8-inch range like perlite, pumice, scoria, crushed granite, etc. Proper drainage is critical, as you have learned.

These plants need to adjust gradually to changing conditions. Going from the coffee table at room temperature to the back porch in full sun, and heat was just too much of a change too quickly. You cooked them.

All of us have done something like this before, so don't feel bad. It happens to the best of us. Remember to let plants slowly get used to full sun and high temps.

Brad

Jeeez. Thank you both for the info. These are my first succulents, and I admittedly was unaware they took different care than an ordinary hardy house plant. :( Fortunately, these were tiny little guys that I got for about two bucks each.

You haven't lived until you've rotted a $50 plant, let me tell ya.

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The Blue Giant might have some salvageable leaves. Pull them off, put them somewhere dry and cool, and see if any of them put out roots. In the meantime, read up on why gritty mixes work and figure out where you can get the materials. It is worth it -- gritty mixes are particularly good for succulents because they really need the openness and can cope with any underwatering that might occur (peppers certainly can't).

You haven't lived until you've rotted a $50 plant, let me tell ya.

Or until you pay extra for something on its own roots and immediately rot them off. Fingers crossed that the rest of the plant will make it.

What did you manage to rot?

I took the haworthia out last night and put it back in it's old pot. I figured the soil would dry out easier that way. Today it's dry so I'm just not going to touch that guy for a little while.

I have some of the Blue Giant leaves laying out on top of dry soil, and the Echeveria purpusorum is laying out, still with soil attached at the roots, to dry. I don't have another pot for it because there's another plant occupying it's old pot right now. The soil is dry and I'm going to put it in a new pot tonight. The color didnt get any worse over night or during the day today (it had been getting progressively worse before) so maybe it'll survive?

As for the Sempervivum, I'm pretty sure he's a goner, but just in case, I plucked off all of the discolored leaves, and left the ones with a little color yet. That one is also un potted. Tonight some of the color is worse than it was last night, so I think it's done for.

On a lighter note, I came home to a present on my door step today... a succulent garden! Apparently Monday after my boyfriend saw how disappointed I was, he ordered one from a florist and it was delivered today. As happy as I am, I'm scared I'm going to kill these, too! The first thing I did was look at the care sheet. It was blank. I know it had to have been expensive, so I'm going to try really hard not to kill them. Here are two pictures of the new ones.. anyone have id's?

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What a nice gesture. Not too sure about the IDs (definitely an aloe and a Crassula ovata, maybe a Kalanchoe), but there's nothing especially tricky in there. They will need to come out of that pot before they grow any more and make removal difficult. I doubt it has any drainage holes, and I doubt the soil in there is any good.

If you'd like to drill the container and use it as a pot, it'll need to be on feet or matting so that the water can escape. Containers can be used in the medium-long term for mixed plantings if you separate the individual plants into their own pots. I've done this with a bunch of Haworthias, and while they have practically the same water and light requirements it's handy to have that one madly-growing plant keeping its roots to itself.