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Clematis Columbiana NNS 06-143 |
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Aidan ![]() Newbie ![]() ![]() Joined: 21 Apr 2008 Location: Leeds Posts: 20 |
![]() ![]() ![]() Posted: 04 May 2008 at 5:44pm |
Hi folks
Can anyone give me some advice about this clematis please? In my never ending quest for unusual clematis today I came across and purchased a seedling of c.columbiana at the RHS Harlow Carr spring plant fair. It was described as c.columbiana var columbiana NN3 06-143. I have checked out my reference books and it is described by Barry Fretwell as hardy but rather difficult and challenging to grow. Likewise Christopher Grey-Wilson describes it as more challenging to grow and for that reason seldom seen in cultivation. Why exactly is this - what problems are there with growing it?
Turning to the master; Magnus Johnson says the species is very rich in forms which is the reason for a great number of synonyms for it (he says var columbiana is a synonym of columbiana. Although Magnus makes no comment about it being challenging to grow, he does say that in the Rocky Mountains it grows preferably on stony soil, readily in some shade under conifers. He says it grows under Pinus ponderosa and Quercus gambelii (whatever that is!) where the soil was gravelly and covered by a layer of needles. Is this the clue to why it is so challenging to grow?
Any advice on hardiness, soil requirements and aspect would be much appreciated.
Aidan
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Aidan ![]() Newbie ![]() ![]() Joined: 21 Apr 2008 Location: Leeds Posts: 20 |
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Well here I am replying to myself - how mad is that!!
![]() It occurs to me that this may also be the case with clematis columbiana var columbiana (feel free to prove me wrong). My columbiana is also growing extremely slowly and has probably only put on 2" height since beginning of May. When I have a spare moment, I will post a picture of it.
![]() Aidan
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Paul ![]() Groupie ![]() ![]() Joined: 19 Dec 2006 Posts: 42 |
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Hi Aidan Somebody else who is currently having great success with tenuiloba is ‘Bluethumb’. You can experience this on the thread 'Tenuiloba Surprise' at http://www.gardenbuddies.com/forum/messages/4298/111170166.html Hope this helps |
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Paul
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Nunn00123 ![]() Senior Member ![]() Joined: 15 Dec 2007 Posts: 139 |
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Re; C. columbiana and tenuiloba. I have been growing C. tenuiloba for 6 years,( same plant) in my alpine mix but with added lime and cockle shell grit. It flowers in April every year. Is kept in a clay pot in a pine bark plunge bed in the cold greenhouse. It is kept very dry during winter and most of the summer, only watering to add moisture before and during flowering. I too have not had success with C. columbiana, as I generally loose the plants after a year or two. Both would seem to benefit from being kept on the dry side in well drained compost. Columbiana may require slightly acid compost, but tenuiloba requires lime. Columbiana is a woodland plant, whereas tenuiloba is a true alpine. I fear that it maybe slightly too hot for us to grow these species, but a late friend used to grow both species outside on the Western side of Scotland. Roy Nunn, Cambridge |
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