Osmunda claytoniana Interrupted Fern Description Very similar to the Cinnamon Fern. Mid-way along the frond the pinnae are interrupted by smaller spore-bearing pinnae. Tolerates dry, neutral soils better than most. Quite foolproof. The fiddleheads in spring are deliciously edible. Characteristics Hardiness Zone: 3-7 Light requirements: Part Sun Height: 3-5' Native: Yes Sizes & Prices Size: 2 Yr $13.98 Other Information All Fern, Interrupted Interrupted Fern Osmunda claytoniana Zone: 3-7 Part Sun HT: 3-5'