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 Rhododendron Sinogrande 
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Joined: Mon Oct 29, 2007 4:06 pm
Posts: 4467
Location: Islington, London UK
Post Re: Rhododendron Sinogrande
I was at Glendoick in April and I photographed these Rhododendrons for sale in the garden centre (as well as scores of others growing in the garden):

Rh. calophytum
Rh. viallii
Rh. sinogrande
Falconera/Grandia
Rh. rex ssp. fictolacteum
Rh.
'Graziela'

There were quite a few others - those were the ones that caught my eye.

I ran into Kenneth Cox as I was exploring the garden (in the rain), but it was a Bank Holiday and he was showing members of his family around, so I didn't pester him too much.

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51º33'07"N x 0º07'21"W
43m (142 feet) ASL


Thu May 25, 2017 7:27 am
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Joined: Sun Mar 24, 2013 2:37 pm
Posts: 200
Location: Halifax, NS
Post Re: Rhododendron Sinogrande
I suspect they have a lot of collected wild seed in storage, perhaps enough to last them a number of years. I recall one big clementinae there, no doubt there are others sp crossing is an option. As with other specialty nurseries they'll have to do and grow whatever it takes to survive.

Apparently the Glendoick Gardebn Centre itself is doing well indeed but the direction has changed.

john


Thu May 25, 2017 7:39 pm
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
Amazing sinogrande photos John!! I assume your sinogrande is the high elevation form?


Sat May 27, 2017 12:27 am
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
The much-anticipated sinogrande arrived on 6/6/17 and I potted it up the same day.
It is 30" tall (76.2 cm). Please click on each photo to see larger.
New-growth leaves are 13" long (33 cm).

Image




Image


Last edited by Anne Rhody on Tue Jun 13, 2017 1:00 pm, edited 1 time in total.



Sun Jun 11, 2017 2:56 am
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
She's a beauty Annie. How long are the leaves?


Tue Jun 13, 2017 12:43 am
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron sinogrande
Thank you, Tim.
I think it was a lucky purchase, considering it was via mail order.
I am going out now (11:10 p.m.) to measure the leaves.

New-growth leaves are 13" long (33 cm).


Last edited by Anne Rhody on Tue Jun 13, 2017 1:02 pm, edited 1 time in total.



Tue Jun 13, 2017 4:23 am
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
13" (33 cm).......NICE!


Tue Jun 13, 2017 12:22 pm
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
Sorry - I did the conversion to metric last night and forgot to put it in my message.
Have added it to original post and the subsequent one now.
I also purchased four very small sinogrande from another source. It will be a while until they are noteworthy.

Image


Tue Jun 13, 2017 1:00 pm
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
That's a lot of sinograndes. What are your plans?


Wed Jun 14, 2017 12:03 am
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
Just to have fun with them - watch them grow and admire the foliage.


Wed Jun 14, 2017 12:22 am
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
As previously posted, I have five new R. sinogrande - four small ones and one larger one.
I live in Zone 6a (average winter low -10 degrees F/ -23 degrees C) where winters are too cold to leave these plants outside.
All five are in pots.
Where do you think would be the best place to overwinter them?
a) an unheated garage with north facing windows which are approx. 12 feet above the floor of the garage?
b) an unfinished basement with a south facing window approx. 4 feet above the floor? I could put them on a table near the window.
There is heat in the basement, but no vents on the end near the window mentioned above.

Your suggestions would be appreciated. Thank you.


Thu Jun 29, 2017 3:03 pm
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
Sad news. We have had temperatures of 98F IN THE SHADE (36C) for days on end.
My large sinogrande appears to be struggling or even given up. The upper leaves are drooping.
I have done careful watering and yesterday brought it into the house.
It may be too late.
The four smaller sinograndes are doing well.
With heat like this it is difficult.

My lovely hodgsonii has really gone under. The leaves are hanging down totally.
Probably is dead. Woe is me.
Here it is in its glory on 10-1-16.
Image



Image


Thu Jul 27, 2017 5:08 pm
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
I'm sorry to hear about your sinograndes and hodgsonii. I hope they recover from your heat wave. Perhaps you can bring them into your basement during the heat wave? Let us know how they fair. We just had a couple cool days with high temperatures only hitting the mid 60's F (19C)........what a difference.


Sat Jul 29, 2017 1:35 am
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Joined: Mon May 30, 2016 3:16 am
Posts: 171
Location: Missouri USA
Post Rhododendron Sinogrande
Tim B. - hodgsonii and the big sinogrande are both goners.
Had I been more diligent I could have brought them inside before it was too late. Have made note to take precautions next year.
I have been VERY busy dealing with armadillo attacks in my garden. We are talking 50-70 AREAS dug up each time the armadillo visits.
At the same time a pileated woodpecker has been knocking the bark off two dead pine trees in my front yard, which are waiting to be cut down - tree bark all over the place.
The four small sinogrande from another source are doing fine and are still outside. I was told by the place where I bought the big sinogrande that their source "dried up" - no more available.
It is possible that their source was a nursery in that area which has stopped selling species because of a SOD outbreak. Not sure.

Here is a picture of just PART of the armadillo damage from only one night.
Someone is out there tonight with a rifle in hopes of getting that armadillo.

Image


Sun Jul 30, 2017 1:46 am
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Joined: Wed Feb 13, 2013 11:56 pm
Posts: 389
Location: Seekonk, Massachusetts USA, USDA zone 6b
Post Re: Rhododendron Sinogrande
Sorry to hear about your armadillo intrusion, good thing we don't have those critters up here. Any clue why the big sinogrande died but the small ones did ok?

Love those pine tree trunks..........beauties. What's the big leaf Rhododendron far in the back?


Sun Jul 30, 2017 2:07 am
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