Your plantlets are pretty old- its natural for the parent leaf to dry out- and leaf propagation is not a very successful method.

I'm not concerned about the leaves dying off. I' concerned about the marks on the plants leaves/petals. They aren't very old and are still quite small, but it's not the only pot that has this happening.

Here is another one that I just cut off the plant because it looks so bad and I'm afraid it will spread

Looks like sunburn.

Also, I haven't moved their locations since potting.

Doesnt matter- sometimes sudden weather changes can cause that too- the damage is too uniform to be some kind of pest. Perchance, did you spray them with anything?

Ahhh. I'm in SW FL and they are on my patio facing West getting morning sun until about 10:30 or 11 AM. The mother plants are quite etoliated in a spot right near them but doesn't get direct sun. I'm not sure where to move them so that they can be healthy and compact yet not sunburned. Thank you for your help.

Patio? Outside? Were they rained upon, or it was very humid recently, and then very sunny?

I have lightly misted them with water every day since it' started to get hot but I've noticed that my daughter has been trigger happy with the alcohol chasing away anything she sees on all of them.

They are in superfly bonsai gritty mix in a 3 inch pot outside on our patio. How often do you think they need watering?

Yep, sunburn..... spraying plants with stuff,water or alcohol than placing them in the sun(and the sun is near the peak for us in the northern hemisphere), will result in sunburn, strong sun or moderate .

They aren' getting rained on but it's definitey humid.

Your soil is okay, as for the watering, id do it slightly less - and maybe try to spray the roots more, not the plant itself- they tend to coat themselves with glaucous material to shield them from the sun.

Will they recover from sunburn at this young age?

its not serious - its not severe, and its not infected. Given time, and proper care , they should recover. I lost cacti and succulents due to severe sunburn(and believe me i do mean severe), so i can tell. Just do not humidify them- at this stage its better to water regularly, albeit being with a small amount, applied precisely with a small measure cup or something.

I just got these in the mail. Will any of them be able to get the sun in the same location?

Do not mist the roots. Introduce them to their living place gradually. Mix is okay,wait after potting,i usually wait 2 weeks, but in your case, 1 week should suffice since roots are bare . The 2 weeks apply for me is because i clean dutch wholesale nursery soil from the roots, because its bad....

Id also be very careful with the topmost plant- its cute appearance hides a deceitful defense system of tiny spines that embed in skin easily. Use tongs to handle the cacti- they are small enough,

I'm sorry. I have one more question. How soon after potting propagated leaves can the little guys be fertilized?

Got no idea on that- dont use fertilizer, when i did , it caused more harm than good. Your plants will do fine without- might even make them less etiolated(overuse of fertilizer may cause that as well). Fertilizer is only a must for rare and difficult plants(rare cacti, crassula budhas temple, some stapeliads and euphorbiads...etc) that grow in an almost soilless mix.

Hahaha!!! I've got some hidden in my hands that I can't find but somehow find a way to remind me that they're there. I thought that they were like the bunny ears when I unpacked the box. Much to my surprise, I had an impromptu date with some Epsom salt. My poor bunny ears is quite wilted so I had to repor recently because I wanted to check to roots to make sure that wasn' the problem. Thankfully just a fuzzy little cutie and no splinters.

First cactus i bought....... glochid on first touch...... i regret not caring for it, turned out to be pretty rare. Some kind of opuntia macrorhiza or something like that.

That's gotta hurt! I'll definitely wear gloves. Thank you, Stefan. I appreciate all your help.

Gloves will be rendered useless afterward.....just so you know.

I'm about 130-140 miles south of you, but other than your being a little colder in the winter we have the same weather. All of my plants are outside in the sun and getting all the rain that mother nature gives us. I'm glad to see your gritty potting mix. That is the only way our plants will survive the summers.

Most of your plants can go out into the sun. You just have to wean them into more sun, just like we do for ourselves. We'll both burn. So over a couple of weeks, move the plants into more and more sun so they can tolerate the move. If your mother plant is on the lanai and is etiolated, it needs more sun/light.

There are some plants that hate our heat and humidity of summer. Aeoniums and Echeveria give me fits, but I have found that if I bring them in for the summer and go back outside in October they will do well. All of our succulents like good air circulation, too.

I've had plants get those marks on them and often I wasn't sure what caused it. But most of the plants outgrew the yucky leaves, so I didn't worry about it much. Excess alcohol spray may be your culprit. I've had it in cold and in heat, too. These guys show sunburn -

after I beheaded a plant - I didn't consider that the lower part of the plant had been shaded by the top. Oops!

I didn't read each answer thoroughly and don't know if it was mentioned, but would consider a pest munching on your plants. Marks are very much damage to the leaves, that have callused over the bite marks. They are in same spot on the leaves and all around: something was feasting on your plantlets at one time when rosette was bit smaller. Sunburn looks different as you can see in Crenda's photos.

I agree with Rina. Looks like at one point a little creature was making a meal out of your babies. I have a couple little plantlets that had the same issue and mealies were the culprit. For me mealies are always the culprit. I’m not saying yours was mealy bugs, but definitely some type of critter. Just keep your eye on it. Looks like the new growth is fine.

This isn’t the best example, but you can see how mealies ate the center and made the growth strange. I’ve seen it were it’s more scab rings like yours, but unfortunately I don’t have a good pic of that and all the plants that had it are all grown out:).

If it was critters, scaring looks like slug damage. But slugs cannot bite that uniformly.

RSMAC

It could have been slugs or snails, it could have been one of many other critters and bugs. Or it could have bean a squirrel or a chipmunk. Not a moth, but larvae. IIRC, moths and butterlies feed on nectar, but their larvae will feed on leaves. Adults will lay eggs and their larvae (caterpillars) feeds on leaves.

Uniformity happens when they munch on still quite closed/compact rosette - new growth is what many critters and bugs like. They chew on the fresh center, and as the leaves grow, you can see very uniform damage. Nor unusual - I have seen it on other plants too.

And I agree with Kara - mealies will leave damaged leaves. They are bugs that also suck up juices from leaves. Their larvae lives in soil, so damage would be done by adults and is not as regular as on OP's plant; Kara posted very good photo of mealies damage.

As for fertilizer, some ppl use it and some don't (I am rather in 'don't' category). But fertilizer could be used for most of succulents, not only rare ones. It should not be overused...I grow succulents 'hard' - with almost no fertilizer (maybe once or twice a Summer - some years not at all); and they are all in very inorganic mix.

BTW, what did you use Epsom salt for?

Well I potted my new ones and repotted some of the others. I didn't see any bugs or scale that I could tell so if it was a critter, hopefully it was just passing through. Thank you all for your input.

Rina, the Epsom salt was for my hands. Haha! I'd been stuck a thousand times.