Winter Injury

Buds fail to break or collapse shortly after emerging on roses (Rosa pisocarpa); severe cases turn canes black. Cold and dry wind damage dormant scion tissues, especially on late-fertilized plants. Choose cold-hardy cultivars, avoid fall fertilization, use non-water-retaining mulch, and plant graft unions deeper in cold regions. Select disease-free stock adapted to your zone.

Do not fertilize late in the growing season. Chose a cultivar adapted to your growth zone. Remove infected material promptly and improve growing conditions to limit pathogen spread. Good sanitation, adequate spacing, and proper irrigation practices reduce disease pressure over time.