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Author Topic: Rhododendrons 2017  (Read 16802 times)

johnralphcarpenter

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Re: Rhododendrons 2017
« Reply #15 on: March 28, 2017, 07:18:34 PM »
Rhododendron pemakoense.
Ralph Carpenter near Ashford, Kent, UK. USDA Zone 8 (9 in a good year)

Mark Griffiths

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Re: Rhododendrons 2017
« Reply #16 on: March 29, 2017, 07:29:10 PM »
wondering if someone can help me. I've had Rhododendron Cephalanthum Crebreflorum Gp for about 10 years now and every year it covered itself in flowers. This winter (before the freeze) I noticed that some of it was dying and that has continued. Pretty sure it didn't dry out in the summer before. I suspect it's had it but if anyone can suggest a cause I'd be grateful.

Oxford, UK
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johnw

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Re: Rhododendrons 2017
« Reply #17 on: March 29, 2017, 08:15:35 PM »
Mark - My first two thoughts would be the drainage has gone off (one of the Phytophthoras) or drought, this sp. seems super sensitive to both.   Any chance the weevils have girdled the trunk or devoured the roots?  Great pity as it appears to be a sizeable plant.

john
John in coastal Nova Scotia

johnw

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Re: Rhododendrons 2017
« Reply #18 on: April 01, 2017, 08:15:30 PM »
From Jens Birck's Copenhagen garden this morning.  The nearly impossible to bud and flower R. proteoides in two different forms, a Jens' cinnabarinum cross, possibly the hardiest cinn cross done to date and lastly the fine foliage & flowers of R. uvarifolium.

1 proteoides cw seedling
2 proteoides cw Svend Hansen #99-35
3 Charme La x cinnabarinum 'Nepal'
4 Charme La x cinnabarinum 'Nepal'
5 uvarifolium

johnw
John in coastal Nova Scotia

Steve Garvie

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Re: Rhododendrons 2017
« Reply #19 on: April 01, 2017, 09:43:22 PM »
Great to see the buds on proteoides John. My plant had a couple of buds last year which sadly aborted -I wish I knew why.  ???
WILDLIFE PHOTOSTREAM: http://www.flickr.com/photos/rainbirder/


Steve
West Fife, Scotland.

johnw

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Re: Rhododendrons 2017
« Reply #20 on: April 01, 2017, 11:53:06 PM »
Steve  - We wondered the same of pronum and a recent RSBG article  by Bengt Ernejberg on the high altitude climate where proteoides and pronum dwell hints at a possible reason for the bud abortion of these cranky subjects.    Seems the rains start in summer and continue unabated through to winter.  We think summer dryness itself or that dryness followed by autumn rains may cause the buds to move and then get zapped.

john
John in coastal Nova Scotia

Steve Garvie

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Re: Rhododendrons 2017
« Reply #21 on: April 03, 2017, 10:23:04 PM »
Aye John, Rh. pronum has brought me close to tears.
I have had my plant (the R.B. Cooke clone) for about 22 years. Over the last 20 years it grew into a fine specimen of about 80cm diameter. It lived on a small raised bed adjacent to the house until 2 years ago when I had to move it (to allow for structural work on the house). I moved it to a raised peat bed where unfortunately it was both ravaged by Vine Weevils and then sustained massive die-back from the centre. By this point the plant was now in two substantially smaller pieces. Both were transplanted to separate sites and the more viable of the two has produced a couple of flower buds this year -presumably an attempt to replicate before it "taks the craw road". Sadly the flowers are not worth the 22 year wait!

WILDLIFE PHOTOSTREAM: http://www.flickr.com/photos/rainbirder/


Steve
West Fife, Scotland.

johnw

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Re: Rhododendrons 2017
« Reply #22 on: April 05, 2017, 02:57:31 PM »
More from Jens Birck in Copenhagen this morning.

1 - thomsonii
2 - 4 clones of cw recurvoides
3 - proteoides cw seedling still nicely holding its yellow. Very promising.

john
John in coastal Nova Scotia

johnw

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Re: Rhododendrons 2017
« Reply #23 on: April 07, 2017, 02:30:51 PM »
My R. sinogrande is in flower!  From seed as Cox's best selfed (ARS94-262).

johnw
Halifax, NS
John in coastal Nova Scotia

Maggi Young

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Re: Rhododendrons 2017
« Reply #24 on: April 07, 2017, 03:42:20 PM »
That is fantastic!
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

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johnw

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Re: Rhododendrons 2017
« Reply #25 on: April 08, 2017, 02:34:19 PM »
That is fantastic!

Fantastic indeed and far too tender for Nova Scotia as well as eastern North America I'm afraid.  This is in fact a seedling I grew back in 1994 and which I gave to my late friend Geo. Romanes in Kishorn, Scotland (just south of Applecross and Inverewe).  We never dreamt that it would eventually settle in and do so well there as the Atlantic is just 60ft away and winds howl into that garden. His daughter Mully now tends the plants there.  Another seedling went to a friend in Cambelltown but haven't had a report back in some time, it must have been sheltered as it took off straight away.

john
« Last Edit: April 18, 2017, 09:13:42 PM by johnw »
John in coastal Nova Scotia

Gabriela

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Re: Rhododendrons 2017
« Reply #26 on: April 08, 2017, 02:41:43 PM »
My R. sinogrande is in flower!  From seed as Cox's best selfed (ARS94-262).
johnw
Halifax, NS

Wow! For a few seconds i thought you have it in your garden; but it must be very rewarding to see it flowering anyway :)
I've seen few nice tree rhododendrons in Victoria at Finnerty Gardens (UVic) but very few were labeled.
Gabriela
Ontario, zone 5
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Thorkild Godsk

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Re: Rhododendrons 2017
« Reply #27 on: April 09, 2017, 06:55:59 AM »
Rhododendron which blooms now:
Rh. recurvoides
Rh. przewalskii
Rh flinkii
Rh luciferum Hobbies bureavii
Rh vellereum

Thorkild DK
Thorkild.dk

David Nicholson

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Re: Rhododendrons 2017
« Reply #28 on: April 10, 2017, 05:35:23 PM »
Rhododendron 'Wren' and R. 'Oban'
David Nicholson
in Devon, UK  Zone 9b
"Victims of satire who are overly defensive, who cry "foul" or just winge to high heaven, might take pause and consider what exactly it is that leaves them so sensitive, when they were happy with satire when they were on the side dishing it out"

johnralphcarpenter

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Re: Rhododendrons 2017
« Reply #29 on: April 11, 2017, 04:34:28 PM »
Rhododendron tomentosum.
Ralph Carpenter near Ashford, Kent, UK. USDA Zone 8 (9 in a good year)

 


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