Sempervivum and Jovibarba forum: Please give me your two cents and then some!!

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Name: Audrie
Parker, CO (Zone 5a)
Jun 25, 2012 3:22 PM CST
I'm not sure what to think about some of my new semps. They were doing great and now all of a sudden some are looking horrible. Can you please tell me what I'm doing wrong? I have them under the deck on my main floor so they are on the basement level. They get about 3 hours of morning sun at most. They have been there since I first got them so nothing has changed. Other than one morning I attempted to give them a couple more hours of sun hoping to get them adjusted to more but immediately moved them when I saw some were getting burned. I planted them in a mixture of MG moisture control potting mix and rock/sand mixture (2-1 ratio). So far I've lost my Pekinese and Minor semps. Crying Here are a few pics... Please help!!! Crying

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Name: Kim
DC area (Zone 6b)
Jun 25, 2012 3:39 PM CST
Confused I'm new with semp and will attempt to help out. If you have them in moisture control potting mix for a while before you moved them for more sun them it must be sun burn and not the mixture. When I have my semps acclimate to more sun I put them in area with filter light such as under a tree (receiving morning light, shade by noon, filter light afternoon, and early evening light). Every week I moved them to less shade and filter light area. Eventually I have them all in full sun and lightly cover those that are prone to sun burn (by placing the cover object to block the sun at its strongest.
Name: Lynn
Dallas, OR (Zone 8b)
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Jun 25, 2012 9:21 PM CST


Good advice Kim.

Audrie in your area the heat and dry air you are experiencing right not is causing the problem for you young and tender plants. Place them back where they were happy. And don't over water with the moisture control in the mix. I think all of those will recover.
The photos do look like they burned, but the centers look okay. They will regrow from the center, adding new leaves as they grow.

In the fall when temps cool down you can acclimate them. But I would talk to Tabby and Sandi to find out what areas will work around your yard.

Charter ATP Member I was one of the first 300 contributors to the plant database!
Jun 25, 2012 10:15 PM CST
What I am seeing in your photos looks like rot to me, which makes me a minority opinion here. I would dig them up, remove the soil (without washing) and damaged leaves, let dry out of the sun a few days, then replant in a soil mix that does not use moisture control. I do have some problems with sunburn here when I move my plants from a semi-shade position to full sun but it does not look like what I see in the photos.

I think you need to dig a few of them up and take a closer look at the damaged leaves. If the leaves are "squishy" where they attach to the stem or have a squishy texture before they dry up, then the root cause is rot. I do strongly advise you to stop all watering for a few weeks, making sure that they are not exposed to hot, direct, afternoon sun. If you do find rot, then you need to air dry the plants out of the soil as quickly as possible. If it is rot, then it is likely the damage will increase unless you dry them.
Name: Pia-Louise
Romford, U.K. (Zone 8b)

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Jul 4, 2012 3:56 PM CST
[...I agree with twitcher, it looks like a tiny bit of rot to me, maybe the soil's a tad too wet for them. Best to underwater than overwater. Especially with the moisture control. They look like they'll get better as valleylynn said, the centers look fine. They need drying if that's the case. Hope that helps!] Pia-Louise x
[...very passionate about Biology and Art. One day I would like to breed award winning hybrids.]

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