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'Rosa tunquinensis Crépin' rose Reviews & Comments
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This species has taken on a semi-climbing habit in it's first year California's semi-tropical low desert.
Growth of most vigorous seedling has exceeded six feet in height.
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#1 of 4 posted
18 OCT 09 by
 Cass
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Robert, did you get any seedlings that were downy?
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I believe I did, though not overtly downy. Downiness seemed to become less evident as seedlings matured.
I kept two seedlings. You got one and I gave the rest to Burling. She must have gotten about 15. I know she plans to share tunquinensis and lyellii with Descanso.
I've been surprised by the vigor of tunquinensis. It seems to love the desert.
How's it performing where you are?
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#3 of 4 posted
18 OCT 09 by
Cass
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R. tunquinensis is extremely vigorous. My plant is (blush) still in a 3 gallon pot, and it's growing 6 foot canes everywhere, with really long laterals that are almost as long as the basals. Some taxonomists group it within R. multiflora (var. multiflora). I haven't seen bloom yet, so I have no opinion. It does show some powdery mildew. The most remarkable thing I've noticed is what I already mentioned - - the weak prickles towards the ends of the canes. It's going in the ground shortly, so I hope to see bloom in the spring. It will interesting to see how it handles winter, which is expected to be mild.
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Cass, the tunquinensis seedling I delivered to you at Celebration of Old Roses in El Cerrito earlier this year was singled out for it's vigor. None of the seedlings were wimpy growers but a few were obviously stronger than others.
I'm disappointed to hear tunquinensis has susceptibility to Powdery Mildew, but I am grateful to you for letting me know. This may preclude my exploration of tunquinensis as hybridizing subject. I'll be vigilant in observing mine this Fall and Winter for signs of the disease. I'd love to know more about why most Asian species in general have susceptibility to Powdery Mildew. It certainly is problematic.
Taxonomic affinity to multiflora might prove an advantage in your climate. Perhaps your lower soil PH will suit tunquinensis?
My largest specimen is still in a 5 gallon container. I'm observing a similar growth habit to yours here as well. I don't have room to place it anywhere as yet.
As I said I'm not sure I'll explore this one. I do know exactly what I would do with it. I'm anxious to see it flower as well. I guess we'll go from there.
Thanks, Robert
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Initial post
17 OCT 09 by
Cass
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Prickles closer to the ends of the canes are rather weak, i.e. easily broken off. Plant is extremely vigorous.
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