Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

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rikuhelin1
Posts: 375
Joined: Sat Jul 16, 2016 7:56 pm

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73067Post rikuhelin1
Sat Jun 05, 2021 12:09 pm

Parts from correspondence with a Prairie Rosarian,

"Percy Wright would put his seeds in tin cans of soil and keep them in a cold cellar until March. Then, he'd take them outside and bury them in a snow drift until spring."

(Riku's note) ... based on the frost in aiti's cold cellar (concrete block with 2x1" air vents to outside and under front concrete steps ... cold cellars can be "cold" (0C+) ... but potatoes did not "black decay" but would sprout.

... another view, Dr. Svejda from book" Canadian Explorer Roses",

"We found that the most effective treatment for breaking dormancy in R rugosa seeds was the combination of 8 weeks at 20C, followed by 12 weeks at 4C."

... "Throughout the program we treated the seeds, which were mixed with moist peat moss, wrapped in plastic and properly labelled, to warm-cold periods of 8 weeks .... For the warm treatment, where temperature level should be constant the seed parcels were placed in an incubator and then transferred to a household refrigerator. The after-ripened seeds in the peat were placed on top of seed flats, covered with soil, and the resulting seedlings were potted before field plantation. The soil used was a mixture of soil, perlite and peat, generally used in our greenhouses."

To zero I go next winter, ... after cleaning, shucking and drying followed by a brief period at room temp.
Riku

rikuhelin1
Posts: 375
Joined: Sat Jul 16, 2016 7:56 pm

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73325Post rikuhelin1
Sun Oct 10, 2021 2:26 pm

Fall 2021 Observations - zone 4A Cdn

Helenae hybrida derivatives

Lykkefund
Year 2 - 1 winter - protected - 3-6 ft thornless canes - no bloom

Ydrerosen - Helenae hybrida X Superexcelsior 2011 Hermansson (sp?)

Year 2 - winter protected - 2-3 foot canes - tallest no thorns - lower canes thorny - repeats as noted - blooming now while fingers freezing in wind as l type - potential

Helenae hybrida - 2nd try better bush heading into winter with good multi-cane growth

Nut shell - not abandoning trial based on Lykkefunds growth and no thorns and ditto for Ydrerosen - all healthy foliage and canes no disease evident and only shiny aphid induced sap painting?
Riku

rikuhelin1
Posts: 375
Joined: Sat Jul 16, 2016 7:56 pm

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73326Post rikuhelin1
Sun Oct 10, 2021 2:36 pm

Pics today remember zone 4A Cdn, Ydrerosen
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Riku

rikuhelin1
Posts: 375
Joined: Sat Jul 16, 2016 7:56 pm

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73327Post rikuhelin1
Sun Oct 10, 2021 2:56 pm

Also planted this year Hermansson’s spino hybrid - excellent growth so far no bloom but expected from spino genes - but should belong in my climate - if the Kordes only provides the color - never can have enough yellow.

Pimpinellifolia plena × Friesia (floribunda, Kordes, 1973)
Riku

rikuhelin1
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Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73328Post rikuhelin1
Sun Oct 10, 2021 2:58 pm

“Kindarosen”
Riku

MidAtlas
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Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73330Post MidAtlas
Sun Oct 10, 2021 10:49 pm

I'd love to hear how Kindarosen does for you--I had run across its HMF page and bookmarked it just a few weeks ago! 'Koresia'/Friesia/Sunsprite is usually a black spot disaster here in Maryland, but I believe it is one of those that is only susceptible to a limited number of strains, and I was able to grow it for a while without too much trouble (winter protection and related issues aside) in Minnesota. It has such a wonderful combination of strong fragrance and intense yellow color, and is worth a solid effort to improve upon its hardiness and disease resistance (and floral lifespan, since it blows so quickly). It would be interesting to get to know its parents, but they are virtually extinct at this point.

Stefan

Plazbo
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Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73332Post Plazbo
Mon Oct 11, 2021 6:42 am

MidAtlas wrote:
Sun Oct 10, 2021 10:49 pm
'Koresia'/Friesia/Sunsprite is usually a black spot disaster here in Maryland, but I believe it is one of those that is only susceptible to a limited number of strains
This is correct based on some research from David.
Sunsprite has a Rdr3 gene, which gives resistance to some strains of blackspot but not others (sadly, not the ones here in east coast Australia either, consistently spotty...I think there's a fair bit of overlap in east coast usa and australia as far as strains just based on how caruth roses fair in both compared to west coast usa).

More info and link to the research in this thread
https://rosebreeders.org/forum/viewtopi ... =2&t=56480

rikuhelin1
Posts: 375
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Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73334Post rikuhelin1
Mon Oct 11, 2021 12:57 pm

Today Kindarosen. I compression plant so its squeezed by a large Skinner Butterball, Carefree Beauty and Marie - Victorin
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Riku

MidAtlas
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Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Post: # 73337Post MidAtlas
Mon Oct 11, 2021 10:15 pm

That looks beautifully healthy--I really like those red canes. I would imagine that it's going to be a good one for you to work with (maybe not quite fully cane hardy, but good enough to carry on breeding?), but it's bound to have some useful traits to work with if it's fertile.

I agree, we do seem to have very similar disease pressure and cultivar performance in parts of the eastern U.S. and eastern Australia. Approximately the same blackspot strains seem to have made themselves equally at home in our regions, too. It makes me wonder if we'd also find that we have the healthiest roses in common, few though they may be.

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