mine does not get mildew. its been getting the brown spots. but been spraying with the liquid copper. I have had this plant going on 12 years. first I tucked it near the lilac tree as I had moved it from an original location where it would have died---too much wet soil. So it stayed in a very shady area totally not tended to at all but survived. Finally I arranged the spot its in now, so this is its 2 years in the new spot, and growing like gang busters, it gets some sun, not harsh direct with dappled shade during the day as the sun moves. Giving me lots of blooms, and new canes. Seems happy except for the brown spots, but they just started so I have been spraying. And yes, not one thorn on it.Zephirine Drouhin very nice rose. I had one planted in a large planter, until some animal snapped it off one night. Here in thge UK, it has to my knowledgr always been listed as thornless. I recently learned that many commercial growers are giving up on it and are stopping production, due to it's mildew attacks.
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