Rose Black Spot

Diplocarpon rosae

Commonly affects Roses,the fungi causes brown, black or purple spots with fringed edges to form on the leaves. Over time leaves will yellow and drop off. Can be distinguished from other leaf spot disease by the fringed edges and dark colour.

Prevention

The fungus thrives in humid conditions. Reduce likelihood of black spot becoming a problem by increasing airflow around plants (by pruning, weeding, not crowding plants), and by avoiding wetting the stem when you water.

Treatment

Spray ornamentals and roses with Combat 3-in-1 for Roses.

Natural Option

Spray plants with Liquid copper over winter to help protect the plant. Pick off affected leaves, and sweep up and take away affected foliage from around the plant.

In severe cases treating with Super Sulphur may be more effective.

Still Looking for Answers?

Talk to the Kings Plant Doctors for expert advice

Ask an Expert

Can’t find the solution to your problem? Ask our Plant Doctors a question or upload a photo and we will get back to you with a solution in no time.

See us instore

There are Plant Doctors in every Kings store all weekend, but you can also book a mid-week consultation. Bring in a photo and we’ll prescribe a solution on the spot!

subscribe

Receive email newsletters with exclusive member only deals & events, plus earn points & convert them to cash discounts!

shop online

Plus check out the latest gardening news, instore events, advice and hot product offers!