- Cinnamon Fern-Osmunda cinnamomea Hardy Planting Zones- 3-10 Sun or Shade – Partial to Full Shade Mature Height - 3-8' Mature Width- 2-12' Bloom Season – n/a Gardener Status- Beginner
OSMUNDASTRUM CINNAMOMEUM - CINNAMON FERN
Cinnamon Fern is named for the brown color it acquires as it ages.
A useful plant, this Fern can aid in stopping soil erosion and is also deer-resistant. They thrive in zones 4-10 and require partial or filtered shade. Their minimal care requirements make them a popular indoor as well as the outdoor plant. They grow 3-8 feet tall. In width, they can grow 2-12 feet, and if allowed to grow unhindered, they cover ground rapidly. They grow widespread across North America and Asia in boggy soil. This means they need lots of water and organic matter to thrive. Besides the seasonal brown color, what distinguishes them from other ferns is that their fertile, brown fronds grow upright in the center of the plant, while the sterile, green fronds radiate out around them. It is after the fertile fronds lose their spores that the sterile fronds grow brown in autumn. The sterile fronds then die and can fall off after the frost. Gardeners should also trim any dead sterile fronds that remain so the plant can thrive again in the spring. There is no need to trim healthy fertile fronds, as they can survive the winter. For first-time plantings, choose a time in spring after the last frost has passed. The ferns must be planted 2-3 feet apart. They provide a beautiful contrast to plants such as the Iris. The Ferns set off the Iris flowers of blue, pink, orange, or red colors during the spring and summer months with flair and complement them with their brown color in the fall. Another eye-catching pairing for the Cinnamon Fern is Lobelia. These flowers also thrive in boggy soil, but their aesthetic value lies primarily in their red, white, blue or pink flowers. With their wide-spread growth, hearty Cinnamon Ferns are a striking addition to any garden.