Black spot on roses is a common disease which infects our prized and cherished roses. Diplocarpon rosae is a type of fungus which develops black spots on the leaves of roses. The leaves turn yellow and drop off weakening the plant and infecting nearby rose bushes.
Gardening in May is a busy time for flower and vegetable growers. With summer on its way, now is the perfect time to tidy up spring flowering plants, perennials and plant out summer bedding plants.