Black spot

Black spot

Symptoms

Purplish-black blotches appear on the leaves, which then start to yellow and fall early. In severe cases the stems also become affected.

Cause

A fungus.

Harm

Badly affected plants may die as they are so seriously weakened they cannot withstand the winter frosts. It is very unsightly.

Treatment

  • Copyright © Crocus.co.uk Ltd 2024. All rights reserved.