Sword ferns blighted. Fungus??
40 year old family of Sword Ferns tht have been happily in place for 25+ years are dying. The fronds of all ferns look blighted, w/ ragged rust-brown patches developing over all fronds. Presently the fronds are "crispy", & are 30 - 40% covered w/the lesions. I didn't see any problem last year, & they haven't been cut back for several years. It looks like a rusty fungus. New frond-shoots were developing, but stopped. PlzIPlz advise me; I just have to save my 20 fern friends
Clackamas County Oregon