Sempervivum forum

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NGA Sempervivum DB - multiple name protocol by AntMan01 Sep 5, 2018 6:26 PM 9
Semp Montage Gallery by AntMan01 Sep 2, 2018 12:10 PM 21
Where is this Semp Dictionary? by Leftwood Aug 31, 2018 8:05 PM 6
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An observation regarding stolons. by Bigtattoo Aug 29, 2018 5:54 PM 12
Who The Hell is Lenamaria? by MelissaHopper Aug 22, 2018 4:40 PM 8
Saving a rotting semp by GeologicalForms Aug 20, 2018 11:26 PM 13
This is an Ask NGA question! Sempervivum name confusion by rmansell2 Aug 20, 2018 11:16 PM 11
Best Soil PH by Bigtrout Aug 20, 2018 5:49 PM 20
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Succulent (?) advice needed by SimoneOdd Aug 18, 2018 11:59 PM 6
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What is happening with my sempervivum? by IJsbrandtGA Aug 16, 2018 10:23 AM 9
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Semp 'Round Midnight' plant habit by AntMan01 Aug 15, 2018 11:45 AM 28
Orostachys by webesemps Aug 14, 2018 3:57 PM 220
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Sempervivum Roots by Blueleaf Aug 14, 2018 2:26 PM 16
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Flowering semp with aberrant chick growths by AntMan01 Aug 13, 2018 9:51 PM 23
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Tour of Labor of Love Landscaping by LabourofLove Aug 12, 2018 10:58 PM 46
separating jovis by LabourofLove Aug 12, 2018 8:35 AM 11
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Gold Nugget Chick Charm and rot by corundum Aug 11, 2018 4:54 PM 16
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Propagating sempervivum from a leaf? This is an echeveria by Pfeffernusse Aug 10, 2018 2:01 PM 8
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This is an Ask NGA question! What is this sempervivum? by bether64 Aug 10, 2018 12:38 PM 12
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It all started with a curious, little green semp. Thanks AntMan01 by Bigtattoo Aug 9, 2018 2:06 PM 3

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Only the members of the Members group may start new threads in this forum.
Moderated by valleylynn and goldfinch4

Welcome to the world of Sempervivum.

Please come in and enjoy the Chat thread and other informative threads. Share your ideas and experiences growing these amazing succulents and post photos of the ones you are growing. Used for container growing, ground cover, rock gardens and hanging baskets. Let your creativity lead you to new ways of using them.

About Sempervivum

Sempervivum Reference Sites

Succulent Nurseries

Articles and Tips About Sempervivum

Sempervivum Dictionary

If you are having problems with your hardy succulents, visit Growing Pains, hosted by Doctor Houseleeks, who will help find just the right treatment to get that plant back to health, or help you understand what to do so you don’t lose another much loved plant.

Recent photos from our
Sempervivum database:

Recent comments from our
Sempervivum database:

Talking about Hen and Chick (Sempervivum 'Borscht'), valleylynn wrote:

MelissaHopper said:My Borscht semp is doing something different.

The biggest rosette, the one in the middle, has started to get ruffles on it's leaves. I have never seen this before.
Thumb of 2018-11-16/MelissaHopper/01e0f9

Closeup
Thumb of 2018-11-16/MelissaHopper/0e54d2



Bigtattoo said:Melissa, the 'Borscht' you sent me is showing some rippling as well. I wonder if this is a winter anomaly. Don't some semps develop warts in winter, then they disappear with new growth in the spring? Could this rippling be a similar effect? Kevin, Lynn, anybody??


JungleShadows said:The ripples are due to uneven growth. Groups of adjacent cells are growing faster than the surrounding cells so the cells from the rapidly growing areas bulge upward. The bumps are in the center of the leaf not the edges. These seem to be a proliferation of cells at these points in the leaf.

This line is full of watermarks and they are likewise due to differences in cell expansion and wax deposition.

It will be interesting to see if down the line I can make these features more or less constant.

Variety is the spice of life!

Kevin


Thank you for the explanation Kevin. Very interesting.

[ Post Reply ]

Talking about Hen and Chicks (Sempervivum 'Engle's 13-2'), valleylynn wrote:

JungleShadows said:

What I have seen marked "Engles" should actually be 'Engle's 13-2'. It is similar but not identical to 'Purdy's 90-1' and 'Aymon Correvon'. When they did the Dalton project to determine the correct names, the thought was that 'Aymon Correvon' ( then recently renamed from "Correvon's hybrid") is the correct name for all three. Helen Payne STRONGLY disagreed with this decision. Since then she was proven right. At the Dalton project, plants going into bloom were quickly removed so that none of the stock plants could be contaminated by seedlings. However, the blooms of these cultivars are different, especially comparing 'Aymon Correvon' to the other two. 'Aymon Correvon' is also BIGGER than the other two. 'Engle's 13-2' has the most compact rosette and leaf shape, with 'Purdy's 90-1' a bit more elongated.

All three are from a montanum X wulfenii cross, probably F1, as that hybrid tends to be sterile or nearly so. I was looking at my notebook from my youth and in '68 I tried to raise seedlings from both 'Engle's 13-2' and 'Purdy's 90-1' and did so each year for 4 years with NO seedlings. My notebook says "seed looks odd, lots of chaff". Both montanum and wulfenii are diploids and their chromosomes must be enough different that it's impossible or nearly so for them to produce normal gametes. Each year here in Oregon I let the bees try to cross 'Aymon Correvon' and each year I dutifully plant the seed, noting "more chaff than seed" still. Despite planting all the open pollinated seed from 4-6 stalks each year not a single seedling has germinated. 'Greenwich Time' which is montanum X calcareum cross (again two diploids) has netted me ONE seedling. It is a nice one though!

Hope that helps!

Kevin

[ Post Reply ]

Talking about Hen and Chicks (Sempervivum 'Purple Passion'), valleylynn wrote:

Makes a very pretty little clump.

Here is Betty Bronow's description:
Linear leaves. Red purple tips and outer leaves. Deepens in winter. Cilia. Satin, Small.

This is Alpine Gardens description:
Green centers with mulberry. Very pointed and fringed outer leaves, Dark tips.

[ Post Reply ]

Talking about Hen and Chicks (Sempervivum 'Greenwich Time'), valleylynn wrote:

A quote from Kevin Vaughn:
JungleShadows said:'Greenwich Time' is from 'Cleveland Morgan' X calcareum. It goes through a couple phases, sometimes looking like a more purple larger version of 'Cleveland Morgan' and sometimes looking like a velvety calcareum. Helen didn't believe me when I told her the pedigree as she had never had calcareum bloom. Several years later a box arrived from Helen with a blooming calcareum and a note attached saying "I believe you now".

It was from my very first year of crossing, If you cover the calcareum stalk you will see that it makes TONS (well maybe not tons, but lots) of pollen. I dud use 'Extra' and 'Guillaume' in crosses last year and rediscovered what I had known in '64: calcareums make lots of pollen!

The only bad thing about 'Greenwich Time' is that it's a cross of two diploids and nearly sterile. I had one seedling last year and about 6 this year from open pollinations. I do save those as they are likely to be odd combinations of things genetically.

Kevin

[ Post Reply ]

Talking about Hen and Chicks (Sempervivum 'Holly Jolly'), valleylynn wrote:

A comment from the breeder of 'Holly Jolly'.

JungleShadows said:Holly Jolly is one of the more unusually patterned Killer seedlings and it did SCREAM XMAS because of the red and green coloration. It's not as big as some of the others from those groups.

Oddly enough I haven't used it much in crosses. I was concentrating on the bigger siblings. (much to Bev's chagrin!)

Kevin

[ Post Reply ]


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