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I have both Schloss Ippenburg and Frederic Mistral planted side by side on a south wall in Zone 6a, heavy clay soil but generously amended with compost and manure - the flowers are somewhat similar, the fragrance is fantastic in both, but on the latter they lasts much longer (weeks as opposed to a few days for Schloss Ippenburg) and it reblooms more easily. Frederic Mistral is also much bushier than the straight HT form of Schloss Ippenburg. Both plants were left without winter protection one year before heavy winter and spring frosts - both had to be cut back to the ground, but came back well and flowered as usual (not much mulching as well). Frederic Mistral, of course, has lost it's bushiness (many canes), so fewer flowers, but the same vigour.
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Hi, do you have any experience of growing Lady Hillingdon in zone 6a? It might be 6b (as I am planning to plant on the south side of the building and a bit out of the wind, but I am still in zone 6a, strictly speaking. What do you think, should I even try? Another one with the same dilemma is Gloire de Dijon, do you know how these two compare in terms of hardiness? Thank you!
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Initial post
10 FEB 19 by
flodur
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This rose is not bred by Rolf Sievers, but by Dr. Dzidra Alfredovna Rieksta, Lettland as 'Ritausma'. The rose was imported by Gustav Strobel in the 1960s on unclarified paths from the Botanical Garden Leningrad / St. Petersburg to Western Europe. Since licensing rights of products of the then USSR were unclear, it was given the name 'Kamchatka' at the reintroduction in 1988 by Ingwer Jensen, who received it via Rolf Sievers, with the remark 'introduced by Rolf Sievers / Ingwer Jensen'. In 1991, BKN Strobel and 2004 Meilland introduced them under the provisional name 'Polaris'. Through direct comparisons of the rose expert Suzanne Verrier, this rose could be given its correct name again. Rolf Sievers has confirmed this true identity and the story to me.
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#2 of 7 posted
11 FEB 19 by
flodur
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That is the problem with stolen roses! Sorry for my typing error, Strobel used the name 'Kamtschatka' (not 'Kamchatka'. And not to be confused with 'Kamchatka Rose' = 'Kamtchatica').
If you put it together with 'Ritausma', Rieksta 1963 = 'Polar Ice', 'Polareis', 'Polarisx', introduced in Germany 1988 as 'Kamtschatka' by Ingwer Jensen - that would be correct. Have a nice day!
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Done. It all looks OK.
But I am now going to share a Note we have had in the file since 2006:
Ritausma vs Polareis. This must be 2 different roses. Here in Norway we are growing this roses. Ritausma been taller and have more slender canes. Polareis has less count of petals and have less pink flowers. The leaves on Ritausma have more slender form. The Polareis roses we have come from BKN Strobel, Germany and the Ritausma roses from Knud Pedersen, Denmark.
Best regards Roger Jaksland, Professional adviser for the Norwegian Rose Society
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#4 of 7 posted
12 FEB 19 by
flodur
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I talked to Rolf Sievers: The only explanation he has, Gustav Strobel received two variations of 'Ritausma' from Leningrad (One was introduced by Rieksta as 'Ritausma', the other came into trade by these special ways, never authorized by Rieksta). We cannot ask Strobel anymore. I passed the question to Erling Østergard, who has the world largest collection of Rugosas.
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#5 of 7 posted
13 FEB 19 by
flodur
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Erling Østergard, Denmark has Ritausma from Knud Pedersen, Polareis from Sangerhausen and Kamtschatka from a nursery in France. All three are the same rose, no differences at all. It could be that the Norwegian roses differ in the stock used - that may have influence on the budded rose.
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Thank you for your trouble flodur. Appreciated.
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#7 of 7 posted
8 AUG by
 mballen
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Speaking of origins, Google translate tells me that the word "Ritausma" means "Dawn" in Latvian, suggesting a Latvian connection. Whatever the origin, it is a glorious rose. I planted one in my cousin's garden in Springs, Long Island, where it has grown into a tree-like shrub and is the Diva of her spring garden.
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#8 of 7 posted
12 days ago by
Kristiina
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How old is this rose? I wonder if it takes a special kind of pruning to get rugosas to this tree-like shape?
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Hi, the phone number listed here does not work, I believe there is a mistake.
Best,
Kristiina
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