I've recently become the inexperienced caretaker of four rose bushes at the house I moved into last year. I've done a fair amount of gardening but was never into roses. Anyway, I feel like it's my responsibility to help them out so I've been giving them mulch making sure to water, deadheading, trimmed them in the winter; it's been fun.
The problem I've been having is with one bush in particular. It was sort of sick looking when I showed up last year but I gave it some mulch, made sure to water it and it looked pretty happy. ...except for its flowers. They get this yellow tint to them while they're still buds and basically look sadder and sadder as they start to bloom. See picture:
One thing that I've noticed is that there are some (but not that many) aphids on the bush. Another factor might be how wet it's been this spring but all the other bushes seem to be doing fine. Plus this guy's flowers never looked that great last year either.
Anyway, guesses would be appreciated.