Thank you so much!!! I'll put it somewhere else. It's out in the full Aussie sun. *sigh* I have so much to learn!! Too much information all at once and I feel like I'm drowning in it!

Dave, my Haworthias don't burn like that. This looks like a rust almost....and it's strange that it would be on the underside of the leaf instead of the side that faces the sky, no?

Just wanted to ask, because I've sunburned Haws before and it didn't look like this. I don't have any suggestion on what else it might be, but it looks bizarre.

That's correct. They do look rusted. I thought there was something on the leaf until I touched it and realized the ones that are that colour are very dry. One actually fell off.

Its mainly on the bottom leaves, top and bottom of the leaf not just the underside and also some of the tips from the top of the plant were very dry too.

In any case, I have put it in a shadier position and have my fingers and toes crossed that it doesn't die. I hate losing plants and there's still so much I am trying to learn!!!

Well, Tahneal, if that's a sempervivum in front of it and if that's doing well then the sun that likes and what Haws like would be quite different. Dave is probably spot on, I've just never seen anything burn like that.

And with very few exceptions, we all learn. There's so much to absorb from other people's trials and experiences.

Thankfully, plants are very quick to explicitly show you in no uncertain terms just how wrong we are, when we are. :-)

I'm still trying to learn the difference between all these plants and learning how to identify them. I have to make tags for them and I have a Pinterest board with the ones I own .... when I identify them. I see so many nice group plantings in containers and I am having a hard time learning what goes with what ... I'll get there in the end. We all start somewhere. Finding info on the net is proving trickier than I would have thought. Echevaria, sepervivum, aeonium... I'm still trying to learn how to tell what is what!!! Lol!! It's fun though, trial and error as you said :)

Just to add to what everyone has already said, I am in Ontario Canada and I found my haws don't even like being in my south facing window I keep them a few feet away from it and they do much better, although I haven't got them to flower yet.

I think it probably is due to to much sun. My variegated limifolia has done this when it's gotten a lot of sun. The rusty colored areas will likely remain, even if you move it to a less sunny spot, but the plant will grow and those older leaves die out.

i think it might be the reflected heat from the rocks-the leaves might actually be burning, dehydrating, particularly if it is a low humidity situation.

grace is right, there are so many factors that affect growth. i am usually slow to give advice because my conditions-a mile high and on the edge of the desert, with humidity usually under 10 %, are so different from most peoples.

tahneal, saw that summer in australia is already brutal-what a world. keep us posted.

Dave - Not so sure I'm on board about this being caused from reflected heat and light from the rocks, but I definitely agree that it is dehydration/heat stress.

Reason is that reflected light is at a significantly lower intensity than direct light. In this case, the top rocks are a fairly neutral colour, which makes this unlikely.

As for stored heat - based on my testing and experiments with heating, the difference is typically just a couple degrees between a dark and a light top dressing. In this case, the rocks aren't very dark so absorbed heat won't be that much higher.

In up to medium sized pots, the temperature of the entire thing pretty much hits equilibrium in less than a few hours, so the size of the rocks doesn't matter much either.

Anyway! What I notice is that plants under stress extract the majority of water from their lowest oldest leaves first. These leaves typically then show the most stress (in this case a reddish rusty colour).

Most likely, the newly repotted roots can't keep up with your current light levels. So putting it in a shadier location is a good solution (yay!). Eventually you can move it to a brighter location as it adjusts.

Grace - Agreed that this Haworthia attenuata doesn't need full sun. It would probably be much happier and grow more vigorously in partial sun / bright shade.

If you are curious to see what a badly sunburned similar Haworthia looks like... I very sadly burned this one when I first put it outside:

Eww, I've burnt one of those poor things to a shriveled up crisp before!! Totally forgot I had it and left it on the fence in the hot hot sun .... Not nice!!

Reason I put my haw in the sun was because I thought it would like it. It was pretty much beside this guy who seems to like it there! I'm learning fast about this aclimatizing business :)

I realise they aren't the same plant but is this a Haworthia or an Aloe ( oh I get embarrassed asking "dumb" questions!!)

Tahneal

The last one is Gasteria - and very nice plant, with stalks f blooms...Don't worry about asking questions, you know the saying: the only stupid question is the one not asked!...and more you ask, more you learn:)

Agreed with Rina on all accounts, that's a very nice Gasteria pillansii. =)

I find Gasteria can handle a lot more light than most Haworthia. Don't worry - I thought my Haworthia wanted more sun too!

Thanks Rina :) I've owned that plant for atleast 11 years. Neglected it for a long time but always flowered for me. It's one tough guy!!

eww-probably true in some areas but when the ambient temp is in the 90's and above and light-particularly uv-is intense, heat damage is easy. anyone who has ever stepped from grass to a gravel or concrete path knows that heat-particularly reflected heat-differentials, can be enormous.

and of course, the more surface that is exposed-not shaded by plants- the greater the heating of the surface and evapo-transpiration.

I might add that if Haworthia are gradually acclimated to full sun, they can look pretty nice. I have posted this one before, but it shows what some sun can do.

Christopher

Just my 2 cents - This plant was in full sun because I forgot to move it. It, too, turned orange. Most of the plant returned to normal after I moved it, and you can see the pups are all fine. So while it looks like rust, it is a suntan. And it doesn't wipe off.