Alan,
I'm finding that my rose blossoms are drying out really fast. On Baronne Prevost, for instance, the roses formed buds that never opened. At first I'm pretty sure it was the thrips which were visible and caused visible damage. But I think now the thrips are gone. And it's Hermosa that's just sitting there with buds that don't open. Some roses like Marie Pavie and Europeana seem to be fine. But some of the roses that have opened such as ZD have fried petals inside a day.
I don't think it's due to water because I'm watering 4 or 5 times a week and the temperature is not hitting 90F. I do know I need mulch.
Any ideas?
Steve
