Sempervivum forum: How much sun for semperiviums?

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Name: Jean
San Clemente, CA (Zone 10a)
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succulentlife
Sep 3, 2019 9:09 AM CST
Is morning sun and afternoon shade what is best for sempervivums? Does this also hold true for potted semps?
Name: tarev
San Joaquin County, CA (Zone 9b)
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tarev
Sep 3, 2019 9:42 AM CST
Hello Jean, what I find with Sempervivums, it is a matter of temperature levels especially during our long dry and hot weather months here in Cali. Typically, I move my semps to a shadier spot during this period and as with most of my succulents they will handle the morning sun better than the very hot and dry afternoons. Sempervivums are typically alpine succulents happier with cooler and sunny environments. When I say cooler, temperature range in the 60F to 80F.

Your location is more coastal so you may have better marine layer cover there. Unlike on my side where we are just in incessant inland heat. When temps starts hitting 90F and higher it is quite normal to see the Semps closing its rosettes as it attempts to endure the excessive heat and conserve moisture loss.

So if you can, position it in morning sun and filtered, shaded area in the afternoons. Light levels still quite strong and duration so long. Thankfully Fall is coming, much needed cooler weather and hopefully some rains later in the season will perk up the Semps even more.
Name: Melissa Hopper
St. Helens, Or (Zone 8a)
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MelissaHopper
Sep 3, 2019 1:40 PM CST
Hi Jean,

I do all my semps in pots and that is how I have them set up in my yard.

Pretty much all my plants are in the shade by 2 in the afternoon.

I have a couple of areas that I have to abandon completely when it gets really hot for an extended period.

Name: Lynn
Dallas, OR (Zone 8b)
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valleylynn
Sep 3, 2019 2:28 PM CST

Moderator

Great advise from both of you Melissa and tarev.
Name: Jean
San Clemente, CA (Zone 10a)
Container Gardener Sedums Sempervivums Foliage Fan Dragonflies Region: California
Hummingbirder Bee Lover Cactus and Succulents Butterflies Garden Procrastinator
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succulentlife
Sep 4, 2019 12:09 PM CST
This info REALLY helps. Thank You!
I have a group of 5 semps that are closing their rosettes and the outer most leaves are dried up. After reading all the information I decided to covered with a shape cloth, hoping that will help for now. Today its already 81° at 11:00am. As tarev mentioned the fall weather should make a big difference. I really love the summer but looking forward to fall for my succulents sake. Thank you all!! Thumbs up
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
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valleylynn
Sep 4, 2019 12:23 PM CST

Moderator

Good morning Jean. Some of mine are doing that this time of year. Others don't even seem to notice the intense sun and drought. Even the stressed one recover once cooler temps and moisture arrive with shorter day light hours.
Name: Jean
San Clemente, CA (Zone 10a)
Container Gardener Sedums Sempervivums Foliage Fan Dragonflies Region: California
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succulentlife
Sep 4, 2019 12:33 PM CST
Hey, Lynn. Yes, the hot weather really affects them. They were doing really well earlier so I added one more variety. It got hot about 3 weeks after that. Poor guy is have a rough time. I know the cooler weather will make a big difference.
I was wondering what varieties you have that aren't minding the sun. I love the semps and would like to have more.
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
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valleylynn
Sep 4, 2019 2:20 PM CST

Moderator

Let me go out and take an inventory.
Right off, all of my calcareum types do well, except for 'Extra' and 'Fire Dragon'.
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Million Pollinator Garden Challenge Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level
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valleylynn
Sep 4, 2019 3:24 PM CST

Moderator

Jean, this is what I have in full sun that is not showing stress from:
1. Full sun
2. Heat, we've had temps in the low to mid 90's and only one day of 100 this summer.
3. No rain, and I've watered about 5 times this summer. I also water at night when it has cooled down. Gives them a chance for the leaves to dry out before the sun hits the next day.

I have many that are heat/sun stress right now, growing in the same beds with the ones on this list. Makes it easy to figure out which ones handle sun, heat the best. These are established plants and that might make a difference.

https://garden.org/lists/view/...
Name: Jean
San Clemente, CA (Zone 10a)
Container Gardener Sedums Sempervivums Foliage Fan Dragonflies Region: California
Hummingbirder Bee Lover Cactus and Succulents Butterflies Garden Procrastinator
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succulentlife
Sep 4, 2019 3:56 PM CST
Lynn, this is so considerate of you. Lovey dubby What a list! This information is quite valuable to me. I'll go thru the list and see what I can find to order. Much appreciated. Thank You!
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Million Pollinator Garden Challenge Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level
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valleylynn
Sep 4, 2019 4:02 PM CST

Moderator

You are welcome Jean. Just understand that anything you get now your will have to protect until your cooler weather arrives. I usually plant them in trays or pots and keep in bright light but no sun until my weather cools and days are shorter. For me that would be about the end of September. Then I plant them out. This applies to in ground or in containers.
Name: Jean
San Clemente, CA (Zone 10a)
Container Gardener Sedums Sempervivums Foliage Fan Dragonflies Region: California
Hummingbirder Bee Lover Cactus and Succulents Butterflies Garden Procrastinator
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succulentlife
Sep 4, 2019 5:05 PM CST
Will do. Thanks!
Name: Heidi
Denver CO (Zone 5a)
Region: Colorado
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HeidiColorado
Sep 6, 2019 1:36 PM CST
Here in Denver, I lost quite a few new ones from MountainCrest, that said "full sun". I even killed a sedum! I think it's just too hot and dry here. The ones in mostly shade are doing great.
[Last edited by HeidiColorado - Sep 6, 2019 1:38 PM (+)]
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Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Million Pollinator Garden Challenge Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level
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valleylynn
Sep 6, 2019 1:48 PM CST

Moderator

You can grow them in Colorado, but they need protection from the intense sun. And the sedum would need quite a bit of supplemental water.
Which ones are doing well for you Heidi?
Name: Heidi
Denver CO (Zone 5a)
Region: Colorado
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HeidiColorado
Sep 6, 2019 2:44 PM CST
Hi Lynn! I will have to check my tags and get back to you on that! I do know that the Heuffelii are doing much better than the others. My whole garden is drought tolerant flowers and grasses and yucca, so I don't water the garden much. I may have lost a few ice plants too. Those I may have overwatered? Most things I planted in the spring. This is my first year trying hardy semps, and my first year in this house. When I first bought it, the garden was completely filled with kochia aka tumbleweed! And the small area of grass/lawn was dead. So it's been a busy summer for me!
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Million Pollinator Garden Challenge Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level
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valleylynn
Sep 6, 2019 2:59 PM CST

Moderator

Wow, you are really on a learning curve with a new place to figure out. Always a challenge, but oh so much fun.
I look forward to seeing your list, and hopefully photos of your semps.
Name: Heidi
Denver CO (Zone 5a)
Region: Colorado
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HeidiColorado
Sep 6, 2019 3:16 PM CST
Thanks Lynne! I will try to get some photos up in a new thread, so as to not hijack this one!
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Million Pollinator Garden Challenge Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level
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valleylynn
Sep 6, 2019 3:18 PM CST

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Thumbs up

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