HELPMEFIND PLANTS COMMERCIAL NON-COMMERCIAL RESOURCES EVENTS PEOPLE RATINGS
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Kim Rupert 
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More wonderful photo contributions to HMF !! Thank you Robert.
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Thank you for all you do, and over twenty years now! =)
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Thanks for the acknowledgement Robert, but least we not forget the past and present selfless, dedicated and loyal volunteers that have made HMF possible.
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Let's see if I can post a comment now.
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Yes, thanks to ALL!
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It's what makes the HMF world go around!
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Double Delight isn't a bad plant, and there are much better actual plants out there, however the coloring of DD just can't be beat in the realm of bi-colors. And, they smell amazing. In Houston it may get a touch of mildew in the spring, or a little blackspot. Nothing tragic.
Double Delight is a garden staple and it's easy to see why it has stuck around so long. Everyone stops to gawk at it, everyone has to put their nose in it, and everyone loves it. It's a bit like having an antique car...sure, there are more reliable and more comfortable newer cars available, but the style and cache of this "oldie but goodie" just can't be beat. IMO, they certainly don't make them like this anymore.
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Cherry Parfait here resembles Double Delight very much. It doesn't have any scent to compare, but it grows without the fungal issues and keep pushing new flowers when Double Delight stops. If you love the Double Delight coloring and don't have to have the scent, but want a stronger grower with healthier foliage, try Cherry Parfait.
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Where does this colour changing ability come from? Would it originally have been inherited form a China rose like 'Archduc Charles'?
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Quite possibly. Some China roses deepen with age, heat and UV. European (and American) types fade.
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#4 of 9 posted
15 FEB 17 by
jedmar
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I believe an important element is 'Rosa foetida bicolor' which is found in the ancestry of many (if not all) red/yellow bicolor roses. This rose has a high concentration of anthocyanin pigments (for red) on the upper side of its petals and an equally high concentration of carotenoid pigments (for yellow) on the lower side. These pigments are then found in varying combinations in its descendants. A good example is 'Rumba', where the red components deepen with time. It is thought that with UV light, biosynthesis of anthocyanins progresses in the direction of higher frequencies of light absorption (darker colours), while biosynthesis of the carotenoids progresses towards lower frequencies of light absorption (orange to light yellow to almost colourless). The resulting effect is that the rose seems to become redder with time. "The Chemistry of Rose Pigments" (1991) by Swiss chemist Conrad Hans Eugster gives a detailed description of these pigments and processes as relating to roses.
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That's very interesting, thank you Kim and Jedmar.
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Thanks for that. Interesting to know, and explains how the 'Charisma' in my garden works.
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#8 of 9 posted
17 JUN 19 by
kgs
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I hear that a lot (about Cherry Parfait being similar to Double Delight) but after comparing both roses in their glory at the International Test Rose Garden in Portland, I see why people say that and yet there's something about Double Delight's coloring that is more complex than Cherry Parfait. Maybe it's that there is more yellow in it.
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For me, Cherry Parfait has not personality or charm. The flowers and color change on Double Delight are much more elegant. It's strange how some roses have that indescribable something, while others of very similar coloring lack.
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This single sport of Renae has all the same shade tolerance, floriferousness and fragrance Renae has. It provides another continuous blooming, fragrant pink Hybrid Musk for shadier situations. Being single, it's also easier to pull pollen from for breeding.
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I note that, unlike Renae, this rose "has prickles." Have you ever derived thornless seedlings from her? Is this rose any more floriferous, as sometimes seen with singles? She looks pretty charming.
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It is charming and I've not grown it for about the past twelve years. I never bred with it.
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I love this rose. Its so cute. I think it will be the main hit for 2016.
Somewhat un-traditional for a floribunda, but in an awesome color and on a healthy plant.
The blooms are great for buttonholes. Which is not something I have seen in a lot of commercial roses in a long while.
The description says deep pink edges, but this rose has the "China affect", meaning the blooms darken with more and more sun. They become red. Deep pink edges is really down-playing the actual effect. They start cream and become more and more red where the sun hits. Very pretty effect.
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How has its health been where you are, Michael? It seems quite intriguing.
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It is pretty good. Good rebloom. Easy to grow. Not too big. Cute blooms. I thought there was BS on it this spring, but I think that was lower leaf anthracnose or cercospora. Anthracnose and/or cerospora is common on the original KO types.
It is HIGHLY sterile. Far more sterile than DKO. Try to dry out and crush pollen for any takes. I would breed it against mildew, as that is what the original KOs love to perpetuate in seedlings.
Just saw someone added the patent information. I have been on patent break during summer. My hypothesis was correct, that is was from DKO and a "Magic Carousel hybrid". Wouldn't have guessed the last 1/4 of the lineage, though. Too obscure for North America.
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Thanks, sir! Mildew is my deal breaker. I would expect black spot from anything Magic Carousel.
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I haven't seen any on it, but I just know that working with DKO requires 2 generations of breeding against it to get it to go away from your own breeding stock.
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I am not sure what happened, but this rose is healthier than ever, but the dang thing is 6' tall now. Never stops blooming. Always has buttonhole type blooms in massive clusters. Bolt upright, too. I guess when its beyond maturity, it gets taller, but stays the same width.
I have no feeling of culling it. It has been a great rose and "color spot", but the spot is all wrong. It belongs where I would put something like Sunshine Daydream or Shreveport. Not going to be a fun rose to move.
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