Posted: 03/03/2013 at 13:25
The air is too CLEAN for roses. Black spot cannot deal with pollution. It's ironic that having such clean air is a block to growing roses. Further inland roses grow better. If I spray regularly, maybe every 2 or 3 weeks, I could grow roses but it was too much of a hassle. I grew Zephydine Drouhin over an arch and I loved it....the fragrance all summer was wonderful. But spraying for black spot, rust, aphids, was too much. Gardening grandma, not sure it is because it's too wet though. The old wisdom that it's best to grow things that suit your soil and location is best then what you grow tells you it's happy!