HELPMEFIND PLANTS COMMERCIAL NON-COMMERCIAL RESOURCES EVENTS PEOPLE RATINGS
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Kim Rupert 
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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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What a pleasure to have this one. It has beautiful disease-free glossy foliage, holds well to the plant and never defoliates in hot weather. Not at all bothered by rain or bad weather. Buds stay full for an extended period of time. They don’t shatter for 5 days, so the bush can end up filled with half open and fully open blooms at the same time. It has a nice form and naturally spreads out yet with stiff, fat canes, so as to not overcrowd or cross branches. Stays relatively stout, never achieving over 4’ tall here, and they tend to grow extra large in Hawaii.
Wonderfully abundant in flowers, it surprises every year as it will spit out random flowers every blooming month for me, which is just about every month except January. Fragrance is a combination of damask, raspberry, and a hint of cinnamon, which is apropos for this particular color, imho.
I would highly recommend this for the novice gardener and the pro alike, especially if you’re like me and do not spray. Just keep it fed, and it will supply abundant fragrant richly red, well formed and well-fragranced blossoms throughout the growing seasons. There is absolutely nothing bad I could say about this 5 Star Winner! ...except that it’s a must-have if you love red and love easy!
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Thank you for your review on the Sweet Spirit. I am in 9b and just had a very humid and blazing hot Summer. Most of my roses didn't perform as well as they did. I am in search for some really heat tolerant roses whose color and fragrance don't fade in hot temperature and are relatively healthy and easy to care for. Based on your review, Sweet Spirit sounds like a good candidate, and I will get one this coming Fall.
Since you are located in 11b, do you have some recommendations of nice heat tolerant roses similar to Sweet Spirit? Thank you in advance for your opinion.
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#2 of 5 posted
7 FEB 22 by
kgs
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I have to say all the reports about Sweet Spirit being disease-free surprise me, because last year (my first with this plant) it had really bad rust--in a garden of close to 30 bushes where other roses either had no rust or in one or two cases had a tiny amount I was able to eradicate by removing leaves. (I had never seen rust in my garden before, and I wonder if Sweet Spirit became a vector.) I am giving it a second chance because I was not good about any preventative treatment the previous winter and spring (cleaning up leaves, dormant spray, copper spray, etc.). But this year I'm back to good habits, and I'm giving this bush extra attention. If Sweet Spirit turns into a rust bucket again, out it goes. It stayed small and my guess is the extent of disease played a role in that. I'm not disbelieving the folks who have had good luck with this rose--no two plants are ever identical, and who knows what mutations might be at work. It definitely is Sweet Spirit and the handful of blooms it produced once the rust went away were lovely.
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Try increasing the water to the plant. It is often VERY easy to induce roses to mildew and rust by water stressing them.
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#5 of 5 posted
13 FEB by
kgs
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Belated reply, but after battling rust again in 2023, despite spraying and whatnot, in early spring 2024 I sprayed Sweet Spirit once with copper and never saw rust again. I appreciate the guidance about water, but I suspect it was just "going through a phase" and then outgrew being prone to rust, as I water even during our short winters. It has stayed on the small side, but that is more likely to its location, and it has a nice "peeping" habit, as I call it, where perfectly formed blooms framed by glossy foliage poke through the picket fence to greet the neighbors.
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