It has been a mild Winter so far and my roses have sprouted a bit if new leaf growth, however some are showing signs of black spot. The roses were chosen to be good or reasonably good disease resistant varieties, but like many others mine were also affected to some degree last year. I was careful to remove and destroy all the old infected leaves last year and I have done so again now. I intend to dig in some manure and good compost in the Spring to help good growth. My question is - would it be advisable to spray with a fungicide treatment now, even though it is Winter?
Roses - black spot problem
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