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Rhododendron leaf spot

Symptoms

A fungal attack causes an outbreak of spots on the leaves. The dark marks are often surrounded by a pinkish-purple ring.

Find it on: rhododendrons, azaleas
Time to act: spring, summer, autumn, winter

Overview

This fungal problem results in rounded spots on the leaves. Although it's unsightly, leaf spot is only a significant problem on poorly growing or unhealthy plants, which might end up dropping a substantial number of leaves.


Solution

A fungal attack causes an outbreak of spots on the leaves. The dark marks are often surrounded by a pinkish-purple ring.

Organic

Promptly remove and destroy all infected leaves, both on the plant and on the ground. Don't put them on the compost heap. Also improve the growing conditions - add a mulch of well-rotted compost, and regularly feed and water. Keep deadheading.



Discuss this problem

Talkback: Rhododendron leaf spot
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nimrod 24/11/2011 at 15:27

Which are the best outdoor tomatos to grow

Regards Nimrod

Gill M 08/05/2012 at 19:14

within 2 days the leaves of my 2 very large plants have turned black,shrivelled and drooped. They have been healthy for the past 12-15 years.  The leaves are that shrivelled they look dead. Any ideas what this may be.

MJ2 20/05/2013 at 17:44

I have a very old victorian rhododendron garden which now appears to have a few trees that are spotted and are looking in general poor condition what should I do and can I treat rather than remove these trees as some are over 100 years old and I do not want to damage the appearance of the garden. Please advise.