The Borage on our plot has been a Rookie success so far, but this week we noticed a spot of Borage bother. While the characteristically brilliant blue flowers are in bloom, the leaves of the plant have gone a decidedly unhealthy looking dusty white. A bit of research has shown that this is likely to be ‘powdery mildew’ which often strikes Borage grown in shady and damp conditions (as ours is).
The question is – what’s the best way to treat this unwelcome visitor ? Google suggests a drink of milk, a compost tea or even a sprinkle of fresh urine might do the job ! With Mr O poised at the flower border ready to do his duty, do you know of a better treatment for powdery mildew ? Answers (gratefully received) on a postcard please !