'Prospero'
jerijen
6 years ago
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Prospero showing extreme chlorosis on multiflora roots
Comments (16)Sherry, have you tried shredded redwood bark? It's often sold in garden shops under the name 'gorilla hair bark'. Redwood bark is slightly acidic, and I use it to mulch my flower beds that contain roses. My mother used redwood bark in her rose garden, and I remember the distinctive smell of the redwood. Today if you go to a garden center they have plenty of bark chips, usually small to medium chunks, and some of it is red *colored* but it isn't redwood, and is sometimes even dyed red. Don't know what the ph would be on wood of unspecified variety. I bought Reines des Violettes in February of this year from Greenmantle (northern California nursery) and planted it in my garden. Heard warnings that it gets chlorosis. But so far no signs of it at all in my garden, and I haven't added any sulfur, iron, or acidifying plantfood. But I did mulch it, along with my other roses in redwood bark. Perhaps the water percolating through the redwood is acidic enough for this rose. Don't know. But I went out yesterday and snapped a few pictures of the leaves of my Reines des Violettes. She seems to be doing just fine. Would be doing even better if the tree trimmers (who removed 3 huge trees for me!) hadn't dropped a big log on her bigger half and smashed it off. However, she's recovered nicely. Melissa Here is a link that might be useful: Leaves of Reines des Violettes...See MoreWeirdly coloured Prospero
Comments (7)This is really interesting! I'm a lapsed biologist (taking a break raising my kids - and I'm an animal biologist, not plant), but I've lately become obsessed with gardening in general and roses in particular. In any case, I've been bouncing around Google scholar trying to find probable explanations for this phenomenon. I didn't find anything definitive in my short search but lots of papers indicating that stress can affect the biochemistry of a plant and that in turn will affect the genetic expression of pigments. Soil composition and pH, of course, also affects the biochemistry and hence the colour. Since these guys have been in the same soil over time, and since the flowers have not been consistently orange, soil alone can't account for the change. But, given the history you describe, it seems likely that the acute stress inflicted by disease(s) may have acted in concert with the soil composition in this case to temporarily affect the biochemistry of the plant such that it expresses this orange colour, with less of the 'blue'. Because the disease stress is temporary, subsequent flushes revert to the more 'normal' plummy tones. Just a guess. The effect could also be intensified given the youth of these particular plants - younger roses tend to be more susceptible to disease. It will be interesting to note your observations in the future! I have to thank you - I get lost in being 'Mommy' sometimes - it's nice to have a brain puzzle! Karen...See More"Benny Lopez" and 'Prospero'
Comments (9)For all cold zoners, Benny Lopez, available from Rose Petals Nursery, is hardy to at least zone 5, where he behaves like a small Damask Perpetual. The time to buy would be now, so he can grow roots before winter. I dump a shovelfull of mulch on him in fall, but even that might not be necessary once he is established....See More'Prospero' -- For ONCE showing the color correctly . . .
Comments (14)Gorgeous Jeri. You have noted your admiration for this red treasure numerous times in the past. I am hoping that perhaps Palatine Roses will have it available grafted next year. If so, you have enabled me....See More
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