This grower is sure of this plant identification.
From Crocus nursery stock
Ostrich fern, Shuttlecock fern, Ostrich plume fern
Matteuccia struthiopteris (Ostrich fern). The is an Ostrich Fern. It will spread by underground runners, so this large fern will need plenty of room.
They will prefer a moist but not wet soil that is neutral or slightly acidic.It prefers light shade, but will tolerate full sun as long as it remains constantly moist. Prune February-March.
Shade, naturaliser, erosion control, greenhouse, under shrubs