Most of us that have been growing roses most of our lives, don't know the new information about black spot. I picked up most of the information I posted above from the Rose Hybridizers Phorum because the focus has been to breed for disease resistant roses for a long time and these are the folks that are talking about the roses diseases they are fighting to bring us better roses.
The information is not secret, but those selling roses do not share this kind of information. The roses that have been introduced in the last several decades have been tested and trialed before introduction, but most of them were not tested in multiple sites. It can easily take ten or more years before a seedling that has been chosen to be tested to comes to market even with the limited testing.
The movement towards testing roses to be "earthkind", meaning that they are good performers without chemical interference, is truly a step forward, but the information is skewed because they don't test the roses in enough different parts of the country to account for the different strains of diseases.
This is why checking with those who grow roses in your own area and climate is truly the best way to find roses that will do well for you.
The only rose that I know of that has been consistently clean for many climates is Kim Rupert's rose, 'Lynnie', but even this rose will show bs in my garden when conditions are right.
The rose in my garden grows much taller and much wider than many gardens. Why ? I truly don't know. I don't treat it differently than any other rose in the garden. Is it right for your garden ? I don't know because I have never grown it in your climate.
Here's a link from HMF for the rose. If you check the garden listings, you will find that it is grown in several different kinds of climates.
http://www.helpmefind.com/gard...
Another rose that has a fine reputation for growing well in many climates is Ralph Moore's 'Linda Campbell'
A photo of when it has been in the ground for two years
Three years later ... no blooms because I had been disbudding the roses for rose curculio weevils ... but a larger plant because I enlarged the deer cage
A link to the HMF data page so that you can see that this rose is also grown in many climates.
http://www.helpmefind.com/rose...
I am not recommending the roses because I have a personal reluctance to do that, but, rather showing you how you can use HMF to research a rose.
Smiles,
Lyn
