Summer of a Thousand Roses — Joyce Bell

Rosaleen Grey has run away to a Warwickshire village, where she meets twin brothers - Michael, the clergyman, and Gabriel, who grows roses. Their domineering Gran warns her to stay away from Gabriel, but no one will explain the mystery surrounding him. However, Rosaleen falls passionately in love with Gabriel so she ignores all the warnings and runs headlong into the heart of the mystery.