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Where are you? Your location makes a world of difference as to what roses will do well for you. And are you no-spray? That probably is the biggest consideration besides hardiness of the rose. What size rose are you looking for? Low growing, or would you consider a climber? "Favorite white rose" is a little broad, lol.
I imagine the discussion at hand is about repeating roses, but my favorite white rose -- indeed, one of my favorite roses -- is 'Madame Hardy'. Simply unmatched, for bloom form, and a lovely scent and good health as well.
My favorite white rose is Pope John Paul 2. It also happens to be the Saddleback Caterpillars favorite. I have been badly stung more than once, by the little greedy guts hiding underneath the leaves. They blend right in. Its okay, they can have the leaves, I will take the blooms. It blooms often and smells heavenly. It does get a little black spot but I wouldnt be without it.
There was intentional spread of RRv by USDA folks (Maryland, into is in a plant pathology note) after the activities of Epstein and Hill at Iowa State.
Beef farmers in southern Iowa were trying to cheaply eradicate multiflora in their farms. Once rose rosette was found in one county in southern Iowa, it could be tested elsewhere in that state.
The first paper by Staple, Allington and Viehmeyer describes what they found in Nebraska, before the activity of Epstein and Hill. Epstein and Hill wrote in a juried publication that RRD seldom infected cultivated roses. IMO their four test plots were somewhat mis interpreted: several were eaten by hungry deer over winter, one may bave been destroyed by a flood and the other included Color Magic which seldom survives winter even in my warm zone.
Mark and a number of other scientists benefitted from USDA research funds. The scientists at U Arkansas are the ones who isolated it as a virus and who created the dendrograms that show its relation to other Ermara viruses named for the European Mountain Ash Ringspot Associated virus.
Wow! 20 at once. I can never remember what I have on waitlist, but it must not be the popular ones because I rarely get a notice. I agree that you have to get at least one or two. Good luck with Diablo Hawk and Incantation!
I hope you get diablo hawk, @fig_insanity Z7b E TN. I was lucky enough to get 1 from Paul a couple of years ago and it's been a stellar rose. But very tall. I didn't know it was such a climber! Healthy too and it's 3rd year blooming a lot
Define 'hardy'.
About 30 years ago, someone sent me a rooted cutting. For all I know, it is still out there, though I don't think I've seen it in the last five years. It has produced a flower or two along the way. I think it may have been a foot tall once,
So if by 'hardy' you mean does not die, 5b is perfectly reasonable. If by 'hardy' you mean becomes a reasonble specimen, its a lot warmer than here.
Malcolm, I'm 7b, so normally much warmer than your area, but Maggie has come through a couple of abnormal winters, i.e., sub-zero Arctic Express winters with days of relentless dry winds. Maggie shrugged it off, very hardy for a (possible) bengale/china (or is she a bourbon?). I can't say she'd endure a full winter of that stuff, but she doesn't mind the occasional dip below 0.