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Author Topic: Cremanthodium  (Read 7430 times)

WimB

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Cremanthodium
« on: June 15, 2009, 08:09:48 PM »
I've been offered some seeds of Cremanthodium rhodocephalum (?) and another unknown Cremanthodium with yellow flowers.

I said I would like them but I've never grown these before. Does anyone here have any pointers regarding it's cultivation?
Do they need shady or sunny conditions? Do they grow best in a swamp or in a leaf-mould soil or on a rockery? What's the best way to sow them?

Wim
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

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Maggi Young

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Re: Cremanthodium
« Reply #1 on: June 15, 2009, 09:27:58 PM »
Wim, the best Cremanthodiums I have heard of in captivity are grown at Tromso Botanic Gardens in far northern Norway.  ;D  That should give you a bit of a clue.
Most references to them in the Forum have been about identifying species. There is a plant portrait in the main SRGC site by Fred Carrie.... this may be of help to you....
  http://www.srgc.org.uk/pport/Cremell.html
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

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WimB

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Re: Cremanthodium
« Reply #2 on: June 18, 2009, 08:45:15 PM »
Thanks Maggi, never tought I would hear myself say this, but it looks like it's going to be too warm in Belgium  ;D ;D  :P for growing Cremanthodium. Nevertheless, I'll try it, you never know...
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

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Maggi Young

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Re: Cremanthodium
« Reply #3 on: June 18, 2009, 09:52:33 PM »
Can't hurt to try when you have the offer of seeds, Wim. At least you can try to give them as cool a spot as possible...I hope in a year or two you can show us fields  full of Belgian cremanthodium  ;D ;) 8)

I am coming more and more to the realisation over the last few years that our Aberdeen garden can be too warm for primulas......there are lots of tricky changes out there  :-\
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

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Susan Band

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Re: Cremanthodium
« Reply #4 on: June 19, 2009, 09:46:27 AM »
Wim,
Some of the Cremanthodium seedlings die down soon after they germinate, they are not dead just sleeping until the next year so don't throw them out. Some of the larger ones are not as difficult as people say (here anyway)
Susan
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David Pilling

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Re: Cremanthodium
« Reply #5 on: July 11, 2009, 01:18:40 AM »
I got some "cremanthodium arnicoides" from the 07/08 AGS seedex, sown at the start of April 2008, one clump of three plants is now about three feet high and flowering.

I originally thought this might contribute to this thread, but I'm wondering if the plant is actually what it said on the packet?



David Pilling at the seaside in North West England.

WimB

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Re: Cremanthodium
« Reply #6 on: July 11, 2009, 07:38:51 AM »
Hi David,

your plant isn't Cremanthodium arnicoides. It looks like a plant I've seen before but I don't remember the name (maybe somewhere in the genus Arnica?).
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

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Magnar

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Re: Cremanthodium
« Reply #7 on: July 11, 2009, 08:22:03 AM »
I agree that plant is not Cremathodium arnicoides. In general I often find Cremathodiums hard to identify, and I also think they hybridize in the garden. But they are easy to grow here up north.

C. rhodocephalum certainy needs growing place which never dries out.
Magnar in Harstad, North Norway

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David Pilling

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Re: Cremanthodium
« Reply #8 on: July 11, 2009, 10:21:19 PM »
Magnar, Wim, thank you for your comments.

I had been wondering why I had got the seeds and planted the things where I did - now I know. Whatever it is, it is a rough looking plant.

David Pilling at the seaside in North West England.

WimB

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Re: Cremanthodium
« Reply #9 on: July 12, 2009, 06:48:59 AM »
David,

the plant it reminds me of is Centaurea macrocephala but it probably isn't.
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

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Lvandelft

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Re: Cremanthodium
« Reply #10 on: July 12, 2009, 07:08:36 AM »
Some huge Inula perhaps?
Luit van Delft, right in the heart of the beautiful flowerbulb district, Noordwijkerhout, Holland.

Sadly Luit died on 14th October 2016 - happily we can still enjoy his posts to the Forum

WimB

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Re: Cremanthodium
« Reply #11 on: July 12, 2009, 07:50:49 AM »
Luit,

it's very similar to Inula helenium indeed.
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

Flemish Rock Garden society (VRV): http://www.vrvforum.be/
Facebook page VRV: http://www.facebook.com/pages/VRV-Vlaamse-Rotsplanten-Vereniging/351755598192270

David Pilling

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Re: Cremanthodium
« Reply #12 on: July 12, 2009, 11:44:11 AM »
it's very similar to Inula helenium indeed.


I think you might be right there. It's got the stem clasping leaves...


David Pilling at the seaside in North West England.

WimB

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Re: Cremanthodium
« Reply #13 on: July 12, 2009, 12:54:17 PM »
it's very similar to Inula helenium indeed.


I think you might be right there. It's got the stem clasping leaves...


It's a nice plant too but no Cremanthodium, it's very usefull though: you can make absinthe with it  ;) and recent research has found out that an extract of this plant can kill "Methicillin-resistant Staphylococcus aureus" (= one of the hospital-bacteria)
Wim Boens - Secretary VRV (Flemish Rock Garden Society) - Seed exchange manager Crocus Group
Wingene Belgium zone 8a

Flemish Rock Garden society (VRV): http://www.vrvforum.be/
Facebook page VRV: http://www.facebook.com/pages/VRV-Vlaamse-Rotsplanten-Vereniging/351755598192270

Tristan_He

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Re: Cremanthodium
« Reply #14 on: May 23, 2016, 10:02:20 PM »
Came across this thread just now - Wim did you have any success with your Cremanthodiums? I have a few seedlings and would welcome any advice (other than moving to the Arctic Circle)

 


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