It sounds like powdery mildew. See guidance above and • plant roses in full sunlight. • space plants to allow ample air circulation • fertilize to maintain vigor but do not overfertilize • avoid wetting leaves when watering; use drip irrigation, if possible • prune affected canes and collect and destroy cuttings (do not compost) • use fungicide with care • in future, select rose varieties that are resistant Reply
It sounds like powdery mildew. See guidance above and
• plant roses in full sunlight.
• space plants to allow ample air circulation
• fertilize to maintain vigor but do not overfertilize
• avoid wetting leaves when watering; use drip irrigation, if possible
• prune affected canes and collect and destroy cuttings (do not compost)
• use fungicide with care
• in future, select rose varieties that are resistant