Sword ferns blighted. Fungus??

Asked June 1, 2020, 6:53 PM EDT

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

1 Response

Sword ferns should be cut back each year because their old leaves become truly ratty looking. It's too late to do that now unless you want some picky work as you sit and cut out only the browning fronds.

Or, mark your calendar to cut down all the fronds very early next year.