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Paul G. Olsen
most recent 31 MAR HIDE POSTS
 
Initial post 30 MAR by a_carl76
I am trying to identify a few of my unknown seedlings and this may be a possible parent. I have a few questions that will help with my determinations:

1) Is L83 a once-bloomer or does it repeat? How well does it repeat if it does?

2) Does the wood on this variety darken during cold weather, especially during the winter?

3) For anyone that has used it in their rose hybridizing program, does it often produce once-bloomers when paired with repeat blooming varieties?
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Reply #1 of 1 posted 31 MAR by Paul G. Olsen
L83 is a once bloomer but flowers for a good length of time.

Hybrids with it can repeat their bloom, but it appears there is a wide variation in how much they do. For example, 'George Vancouver' in a Zone 3 climate is essentially a once bloomer but flowers over a long period of time. On the other hand, 'Rosy Vision' ('Dornroschen' x L83 reputedly repeats quite well. The Swedish 'Anna' and 'Irma' also supposedly repeat quite well. Perhaps to obtain repeat blooming progeny it's best using L83 as the staminate parent in a breeding program as was done in Sweden, but no controlled studies have been done to determine that yet.

The potential of using L83 in breeding programs to develop roses for cold climates (Zone 3) is unlimited. For example, nothing has been done yet combining it with the Meidiland landscape roses that I'm aware of. The progeny would likely have an attractive semi-weeping form and perhaps have increased disease resistance over L83.

For further information, google:

Three New Winter-hardy Explorer Rose Cultivars - HortScience.

Four Novel Swedish Cultivars - HortScience.

'George Vancouver' - HortScience
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most recent 19 MAR SHOW ALL
 
Initial post 15 SEP 10 by Paul G. Olsen
'Prairie Snowdrift' is superior to 'Morden Snowbeauty' in shrub form, flower form/quality, repeat bloom and disease resistance. It is the best semi-hardy white rose to grow in Zone 2 and 3 climates.
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Reply #1 of 1 posted 19 MAR by Byrnes, Robert L.
I just ordered your rose Paul. Is it best used for seed or pollen parent?
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most recent 6 FEB HIDE POSTS
 
Initial post 4 FEB by Paul G. Olsen
The Interactions of Various Rose Species
Percy H. Wright
American Rose Annual 1947

Harison's Hardy - Resulting from pollen of Harison's Yellow placed on pistils of Rosa spinosissima altaica. The flower is similar to Harison's Yellow in doubleness and size, averaging slightly larger; color a deep cream in the center of the flower and pale cream at the outside. Foliage intermediate. Plant more erect than the pollen parent. Much hardier than Harison's Yellow; hardy to -60 F. Fertile.
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Reply #1 of 9 posted 4 FEB by Andrew from Dolton
Hardy to -51 Celsius, really!?
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Reply #2 of 9 posted 5 FEB by Margit Schowalter
Here is a report from the Regina-Leader Post.

"Prairie snow storm (1947)
On January 15, 1947, the front page of the Regina Leader-Post read: “Province Just One Big Snowdrift,” with a story that detailed continuous blizzards, buried trains, and even towns from Winnipeg to Calgary. The snow started in December and hardly ceased, with blizzards that kept hitting every couple of days. On February 3, Regina set a North American record when temperatures reached negative 60 degrees celsius. All highways in and out of the capital were blocked for 10 days, supplies in and out slowed, and people reportedly began travelling from their house to their shed via snow tunnel. Some rural roads and railways in Saskatchewan remained closed until spring."
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Reply #3 of 9 posted 5 FEB by Andrew from Dolton
Thank you Margit, that's very interesting. There are three winters in living memory that were particularly harsh in the U.K. In 1941 there was an ice storm that paralysed transport and bought telephone and power cables down. It was said that if Germany had chosen that moment to invade they could have marched in almost unchallenged so crippled was the infrastructure. In 1962 it started snowing on Boxing Day (24th December) and there was still snow around at Easter. It was cold enough for the sea to freeze on the coasts of Kent and Essex. But 1947 was the coldest. In February snow fell on 26 out of 28 days and a temperature of -21 Celsius was recorded, cold enough to kill off rambler roses in Scotland.
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Reply #4 of 9 posted 5 FEB by Patricia Routley
Thanks Paul. Reference added.
Andrew the reference says -60 F. Fahrenheit?
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Reply #5 of 9 posted 5 FEB by Andrew from Dolton
Yes, I believe -60 Fahrenheit = -51 Celsius.
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Reply #6 of 9 posted 5 FEB by Margit Schowalter
Thank you Andrew. Interesting that the extreme cold of the 1946-1947 winter was spread over so much of the northern hemisphere. And I was complaining when we had an overnight temperature dip of -41C last week!
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Reply #7 of 9 posted 5 FEB by Andrew from Dolton
Usually whatever weather happens in North America we get in some form or another a few weeks later. The last bad winter we had here was 2010 when it was very cold at both the beginning and end of the year. So far in 2018 it has been mild all I could make was a Cornish snowman.
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Reply #8 of 9 posted 5 FEB by Jay-Jay
I had to chuckle, because of Your Cornish "Mudman"
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Reply #9 of 9 posted 6 FEB by Patricia Routley
Love it. Just love it. On ya Andrew! I'll grin all day over this.
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most recent 5 FEB HIDE POSTS
 
Initial post 4 FEB by Paul G. Olsen
The Interactions of Various Rose Species
Percy H. Wright
American Rose Annual 1947

Aylsham - Resulting from pollen of Rosa nitida placed on the pistils of the Rugosa hybrid Hansa. Stature of plant intermediate between the two parents, stems slender with a tendency to recumbency. Flower stems slender and weak. Flower a deep pink, approaching red, free of the violet tones of Hansa, very full, with more petals than Hansa, and much tidier in form, a little smaller. Foliage similar to Rosa nitida but larger and with less autumn coloration. Blooms once in June. Completely fertile.
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Reply #1 of 1 posted 5 FEB by Patricia Routley
Thank you Paul. Reference added.
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