|How best to treat new zealand flax fungal disease? Can you describe what leaves look like, so I can be sure that it is fungal, please?
|I suggest you take a sample of the problem to your County Cooperative Extension office for positive identification before attempting to treat it. They are at: Bernalillo County Cooperative Ext., 1510 Menaul NW, ABQ, 87107, 505-243-1386
Here is a webpage from a New Zealand horticulturist with a photo of fungal leaf spot on a variegated New Zealand flax.