I am in Northern Jersey, and I don't spray, and I have learned to accept that blackspot is a "way of life" for growing roses here. Go to NY Botanical Garden's website. All the roses are listed. The rose garden there is non-spray. (I am planning to go there during lunch break if work slows this week).
But here is a list of roses that have shown good blackspot resistance (which, for me, means less than 10% of leaves infected) in my garden:
Kordes: Sunsprite (very, very blackspot resistant, very fragrant); Cinderela Fairytale (balling big time when it rains), Pomponella Fairytale, Floral Fairytale, Golden Fairytale and Laguna. All of my Fairytales have little smell, and tend to be late bloomers (and are a little boring).
Austin: Heritage, Tamora, Darcy Bussel, Abe Darby and Teasing Georgia. The one that has little resistance:Crocus Rose.
Old garden roses: all of my Burbons tend to blackspot a lot, but it does not really bother me as they are in the back of the bed. I planted a Tea rose (D. De Brabant) a year ago to experiment with zone pushing. It survied our last winter and is blooming its head off right now. So far, no sign of blackspot. (Just to give you an idea, the rose next to it, Julia Child, now is about 30% infected). I planted four other Teas this spring. So far, zero infection.
(They are borderline hardy/supposedly not hardy here, but my DDB seems very happy... So I decided to experiment a bit more).
Others: Red Double Knockout, Bonica and Belinda's Dream.
Climbers: Laguna, New Dawn, Awakening. Eden. Not so good in terms of blackspot resistent: Blaze Improved and Zepherine Droulin.
New roses that are reputedly blackspot resistance that I planted this Spring: Francis Meilland, Lady of Shallot, Souh Africa, Carding Mill.
Q
