Question
Thank you so much for your quick response. Is it okay to plant these in the same south-facing bed where blackspot and mildew have decimated a Zephirine Droughin and Cecile Brunner? I had been told that these were very disease resistant where I purchased them but... Anyway, I have stopped using chemical sprays so I really need something that is spray-free. Thanks, again.------------------------
Followup To
Question -
Of the Damasks, Albas, Gallicas, and Rugosas, which would be the top varieties if disease resistance was the only criteria?
Within your selection, could you please name your top choices for zone 7? Thank you.
Answer -
Albas are totally disease and the Queen of Denmark or Konigin von Danemark is definately the best of the pink ones.
Blanche de Belgque is the best white Alba.
Gallicas are also totally disease free. there are many to chose from but the ones I like the best are, Belle sans Flatterie and Duchess de Bucceleugh.
Damasks can sometimes get problems towards the end of summer. Ispahan is the longest blooming and Leda is white with a red edge to the petals. If you want disease free Rugosas then stay away from the hybrids as they are disease prone. Roseaie de l'Hay is the most fragrant and the largest. The Explorer Series or the Pavement Series are both disease free and fragrant. Hope this helps. Lynnette

Answer
I wish they hadn't told you that Zepherine was disease free as that rose is very prone to black spot. Cecile should have done better but if you are in an area where conditions are perfect for the fungal diseases then you fight an uphill battle. Black spot starts by spores and these can be on top of your soil. The lazy way to keeping them down would be to just cover them up with fresh soil from a different part of the garden or use any mulch you can get in your area and cover it with 4 inches thick. Roses just love cool roots and a mulch always makes them grow better as they hate hot roots. Regardless of what the books tell you, one of the best ways to keep roses clean is to take the hose and wash them off anytime you water them. Just make sure they have enough time to dry off before night sets in. Lynnette