The Arch City Gardener

Journeys In St. Louis Gardening and Beyond

More About Ferns

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Ostrich fern fertile frondI love ferns. Growing up we always had fern as a houseplant or in a garden bed. A graceful Boston fern hung from the window in the kitchen. My mom would mist it regularly, occasionally split it when it outgrew its pot, and adorn it with a red cardinal to show her support for our beloved basedball team, the St. Louis Cardinals. When she died, a lovely Boston fern was sent to the funeral home and I tended it for many years.

While I no longer grow houseplant ferns, ostrich fern (matteuccia struthiopteris) and senstive fern (onoclea sensibilis) have prominence as a backdrop in my shade garden along my south fence. At first, I was a bit apprehensive about growing ferns. I thought they were finnicky and had to have just the right conditions. While that is true in part (isn’t that true for most plants?), I’ve overcome that apprehension and clearly ferns and I have found garden joy. With nearly 12,000 species of ferns worldwide, there’s probably a fern or two that could work in your environment.fernIIIA couple of years before I put in the shade bed, I bought a couple of ostrich ferns and put them in to see how they would do. One quickly withered and turned brown while the other barely clung to  life. I visited the nursery, asked what was up and was told I probably planted them too deep. They like to be planted very shallow and I was instructed to dig up the fern and replant it. “I’m pretty sure it’s dead,” I told nursery pro. Don’t worry about it, she reassured, this type of fern is really hardy.

She was right.

Year after year, the arrival of pansies at the nursery signaled to me the onset of spring. Not any more. The emergence of a tightly wound fiddlehead tells me spring is on its way. The fiddlehead grows as a response to light.Fern tight fiddleheadEarly spring mornings find me running out before work, coffee in hand, to inspect the progress of the fiddleheads. Throughout the growing season, my ferns send out new fiddleheads, which gracefully become a frond supported on a stipe.frond to fernA frond is made up of several leaflets, or pinna and the stipe. And a pinnule is a subleaflet of a pinna. Then there is the blade, which is the expanded leafy part of the frond. The roots of the fern grow on the stipe, which is below the blade. Looking at the photo above you can get the general gist of a fern’s anatomy.

fernII (1280x960)Ferns reproduce through spores; their fronds are sterile. As summer nears its exit spores grow on the ferns. This is as detailed as I am going to get on the reproductive cycle of the fern. This is a G-rated site, after all. However, you might notice that the underside of a frond has brown dots along the pinna, or leaf. These spore-filled dots are called sori and contain thousands of spores. Neither the sensitive nor the ostrich fern grow spores on the underside of their blades. Instead, they produce what is known as a fertile frond. DSCN5016The beaded fertile fronds will eventually turn a cinnamon brown on the senstive fern. I think these dense clusters that make up a fertile frond look somewhat prehistoric. Just like the unfurling fiddlehead, the fertile frond begins to change color in a matter of days. The pictures below were taken about 10 days apart.DSCN5019fern fertile frond close upI’m no longer concerned about the viability of ferns in my gardens. I now have them planted in three areas in the yard and they are very happy. The fern nearest the rain barrel probably gets too much sun but is vigorous nonetheless. DSCN5036Fern by rainbarrelFerns like moisture and humidity. One end of the shade bed sits in a low spot where rain may pool. I regularly mist the fronds with the garden hose and put soaker hoses in the shade bed. In a normal summer, I would water the bed deeply at least once a week. Fortunately this summer we have had plenty of both.

To learn more about ferns and their fascinating anatomy, Cornell University has an easy-to-read section on its web site.

 

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Author: mjarz

Welcome to the Arch City Gardener. My name is Mimi and I started this blog to share my journeys in learning to garden in St. Louis County, Missouri and learn more from my readers who garden. Thanks for reading The Arch City Gardener.

6 thoughts on “More About Ferns

  1. Very detailed post! I too love ferns — just last year I expanded them into a couple of new areas of my garden and hope that they take. It’s the dry spells that make those new areas a challenge, one of them being way at the back of the yard… Love that you have two Missouri native ferns, but you should try more. How about hay-scented fern or lady fern?

    • Thanks Alan. Good idea. I have considered adding ferns to a front yard bed and will look into these. I have never heard of a hay scented fern. Do you grow them.

  2. Mimi,
    I too love ferns and find they make good houseplants. I have some in our bathroom, they get morning light and moisture from the shower. I’m planning on planting some in my new gardens. One I love is the Holly Fern. Interesting post!
    xoxo

  3. Beautiful. Like you, I’m always mesmerized by ferns. I love the way they unfurl themselves for all the world to see — and to see a wooded glade filled with ferns. It takes my breath away.

    • Thank you Kevin. Of all the plants in my garden I am most fascinated by the graceful fern. I plan to try some varieties mentioned by other commentators in a front bed I plan to rehab next year. What types do you grow?

      • There are actually some ferns growing (on their own) in the crown of a date palm in the front yard. I’ll try to post some photos of them on my blog. My other fern is actually a tree — an Australian tree fern. It took a beating from some sort of bug, but I took care of that — and it’s loving the Florida heat and humidity. It can grow to about 8 feet tall — very prehistoric!

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