Scottish Rock Garden Club Forum
Specific Families and Genera => Iris => Topic started by: John85 on May 16, 2019, 12:37:38 PM
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Is there an organic way to control it? Copper sulfate is"allowed" but I am reluctant to use it because it kills a lot of good bugs in the soil.
Very old cvs are less prone to the disease.Can you recommend some resistant cultivars?
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Is leaf-spot mostly a problem on bearded iris / those with rhizomes ? We don't grow any of those - and leaf-spot does not seem to be a problem here, thank goodness. Perhaps our weather is seldom humid enough to encourage its growth ?
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You must be jocking Maggi!Not humid enough in Scotland!Ok the East coast is much drier than the West but even so!
It is mainly a problem with iris germanica hydrids and with the new cultivars even more
Not all iris with a rhizome have that problem