Osmundastrum cinnamomeum

The cinnamon fern is gorgeous , cold - hardy , and a breeze to grow .

With practically no pest or disease military issue , you wo n’t have to dote on or chafe about it like you would other , wimpier planting .

Plus , you have the alternative to circulate spores , which is an enlightening experience for any gardener who has n’t done so before .

A close up horizontal image of the green fronds and unfurling brown ones of a cinnamon fern (Osmundastrum cinnamomeum) growing by a wooden fence.

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I ’m not gon na rest   – writing this pathfinder has me hanker for a snickerdoodle . With each meter I type the Good Book “ Ceylon cinnamon , ” my appetence only grows .

Hopefully your desire for a cinnamon fern rivals my jonesing for a Ceylon cinnamon tree - dusted sugar cookie by the time you reach the end of this guide .

A close up horizontal image of a cinnamon fern (Osmundastrum cinnamomeum) growing in the garden pictured on a soft focus background. To the center and bottom of the frame is green and white printed text.

This flora is sure to find a place in your garden . And after reading this template , you ’ll be well - equipped to keep it glad and vibrant all throughout its hitch .

Here ’s the curriculum :

What You’ll Learn

What Are Cinnamon Ferns?

Hardy in USDA Zones 3 to 9 and arise from the Americas and easterly Asia , cinnamon fern – akaOsmundastrum cinnamomeum – belong to to the Osmundaceae , i.e. the royal fern kinsfolk .

Interestingly enough , O. cinnamomeumis in reality the sole species in this genus , and is n’t known to hybridize with other fern .

The genus nameOsmundastrumacknowledges this flora ’s status as a royalty – “ Osmunder ” was the Anglo - Saxon name for Thor , the god of thunder .

A vertical image of a cinnamon fern (Osmundastrum cinnamomeum) growing in a forest pictured on a dark background.

As the son of Odin the Allfather and heir to the throne of Asgard , Osmunder definitely receive the imperial intervention . The metal money name “ cinnamomeum ” refers to the brown , cinnamony tincture of the spore - produce frond .

Said fertile fronds also secernate themselves by sticking way more stiffly upright , while the sterile frond are light immature and have a more raw - looking arch to them .

Fronds take on yellow and orange chromaticity in fall as they die back , before brown - green fiddleheads issue the next leaping .

A close up horizontal image of the bright orange and yellow foliage of a large cinnamon fern (Osmundastrum cinnamomeum) in autumn.

The single leaflet or pinnae are lance - shaped and have a intimately polar arrangement , each with deeply cut margins and heavy , rust hairsbreadth at their base .

The plant life as a whole has a cascading substance abuse and an average height and width of two to three foot , but these can maturate to five - substructure acme when ease up consistent moisture .

Cultivation and History

Believe it or not , the cinnamon fern first appeared in the fossil record up to 75 million geezerhood ago , make it a know fogy alongsidethe ginkgo tree , the horseshoe Phthirius pubis , and that oneT. rexskeleton from “ Night at the Museum . ”

Different chemical group of Indigneous Americans get hold various uses forO. cinnamomeum .

Cherokee people used it to handle chills , atrophic arthritis , and snakebites , while the Iroquois used it to treat joint pain , menstrual muscle spasm , and sexually transmitted disease . to boot , some Menominee ate the plant so they would n’t alarm any cervid that they hunted .

A vertical image of cinnamon fern (Osmundastrum cinnamomeum) fronds unfurling in the spring.

For any hobbyist forager reading this , these plants are regarded as gently toxic , and many fern take thiaminase , an enzyme that leeches type B vitamin from the body .

Cinnamon ferns are technically eatable and many prefer to eat the unexpanded fiddleheads bare-ass or cook them likeasparagus . Note that thiamin is destroyed in cooking , with the software program of high temperature .

It ’s hard enough for me to corrode regular edible asparagus without copious quantity of common salt and olive rock oil , but ifyoufind the fiddleheads palatable and they do n’t cause sickness or a head ache , then more baron to ya .

A close up horizontal image of cinnamon ferns growing wild pictured on a soft focus background.

But please note as well that all parts of the cinnamon fern are nowrecognized as carcinogenic .

Besides its lotion as a garden ornamental , fibre from the base of cinnamon ferns is sometimes used in growing media for orchids as a way of providing their roots with some much - needed external respiration .

Propagation

Cinnamon ferns can be propagate from spore , division , or transplants , which are ordered here in descending trouble .

From Spores

This is the problematic generation method on this list , but also the most rewarding .

fern go about reproduction a bit otherwise than seed - grow vegetation , and their fascinating life cps is unquestionably worth rehashing :

Beneath the pinna of rich frond are sori , which stop spore - producing structures do it as sporangia .

A close up horizontal image of an old rotting log surrounded by the bright green foliage of cinnamon ferns (Osmundastrum cinnamomeum).

These organs drop down their spore , which drift away on the breaking wind , land , and finally germinate into prothalli , which create egg and sperm cells within themselves .

impregnation occurs , baby ferns emerge from the prothalli , and the circle of living go on .

O. cinnamomeumdrops its spores from May to June , so check that toleave a note in your horticulture journaland check your calendar . During this time , cut away a fertile frond from the balance of the plant .

A vertical image of the orange and yellow foliage of cinnamon ferns (Osmundastrum cinnamomeum) growing wild.

To the best of your ability , since these are prone to squat up and curled , spread the frond flat atop a clean sheet of paper before cloak a second sheet on top of the frond .

entrust your frond - on - paper sandwich somewhere indoors where it wo n’t be disturbed by drafts or nosey roomy . About 24 hours later on , check for dropped spore .

If they ’ve drop successfully , you should see spore on the paper in the approach pattern of the frond . If not , they ’ll appear weak or they ’ll be missing entirely , which point that you harvested the frond either too early or too later .

A vertical image of two clumps of fiddleheads of a Osmundastrum cinnamomeum aka cinnamon fern in spring.

Collect the spore in an gasbag and post it in the refrigerator . Spores can be seed in any time of year and they ’ll last for long time in the refrigerator , so take your time in decide when you want to utilise them !

Is it sowing clip ? Then fill a three- to four - in quite a little with an equal mixture of sphagnum peat moss and perlite – the former for moisture retention , the latter for drainage .

Tamp down the surface , piddle well , then diffuse a match - head - sized amount of spore across the soil Earth’s surface .

A close up vertical image of a cinnamon fern (Osmundastrum cinnamomeum) with hostas in the background.

Seal the pot in a gallon - sizing zip - top plastic baggie before placing it on a sunny windowsill that – if you ’re in the Northern Hemisphere – face up east in summer or south in winter .

conserve filth moisture and indoor temperatures of 65 to 75 ° atomic number 9 throughout this process .

light-green prothalli should form on the grime surface in several weeks ’ time . To stimulate fecundation , start the bag and mist them when they pass a quarter - column inch in height , then zip it back up .

A horizontal image of a cinnamon fern (Osmundastrum cinnamomeum) in autumn surrounded by fallen leaves.

No baby ferns after three month ? Dilute a right dose ( according to instructions ) of liquid houseplant fertilizer down to quarter - metier by supply three part weewee per one part fertilizer , then apply it to the pot mass medium . Reapply once every three month .

After the child fern egress and raise an column inch or two magniloquent , separate them into cluster of two or three .

Each clump should be transplant into its own smoke filled with the same spiritualist described above , or into a large tray with two inches of place between each .

A close up square image of the bright green foliage of a cinnamon fern (Osmundastrum cinnamomeum) growing in the garden.

Either grip the containers up or put themin a terrariumwhere quick and humid atmospheric condition can be maintained . In two weeks , unzip the baggies or result the terrarium lid ajar so the plants can take off to acclimate to less humid term .

Nine months post - sowing , the plants should be ready to harden off .

On a leap day when the risk of frost has passed , leave the baby plants outside in fond to full shade for 30 to 60 minute before bringing them back indoors .

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Add 30 minute to a full hour of out-of-door exposure on each successive 24-hour interval until the baby ferns can last a full day out of doors , at which gunpoint they ’ll be ready to graft into the garden .

From Divisions

Find spores a bore ? Crunched for time ? Dividing is a second sluttish , anddefinitelyfaster .

Dividing a mature fern should occur every three to five eld , on average . If you but want additional plants , then that ’s reasonableness enough to separate .

But once you detect that the center of your fern is all in , or that frond increase is smaller than normal , partition becomes quite necessary .

A close up horizontal image of the packaging of Arbico Organics Triple Threat Beneficial Nematodes bundle isolated on a white background.

In early leap or properly after the first icing in fall , deeply irrigate the cinnamon fern that you intend to part .

prune the fronds back to half a foot above the basis , then dig a circle around the plant space four to six inches out from the outmost frond with a shovel , spade , or garden fork .

Lever the plant out of the ground with your digging implement , get rid of any loose soil from the roots , then put the to - be - divided fern on a tarpaulin so you may easily keep track of your sectionalization .

A close up horizontal image of a root unearthed from the soil showing symptoms of root rot, pictured on a soft focus background.

Slice the root globe into daughter industrial plant of adequate size . Four class is a hearty amount , but more or less than that is all good . Once you have your part , it ’s transplanting time !

Via Transplanting

If you had entree to a mature plant and followed either of the above propagation methods aright , you should have someO. cinnamomeumready to go .

grasp holes crowing enough for the root organization of your transplants . plonk the transplants in the mess , habituate the delve - out soil for backfilling , and then deeply water the organ transplant . Keep the soil moist .

study our fern propagation guide for more tip .

A close up horizontal image of the bright orange fall foliage of a cinnamon fern (Osmundastrum cinnamomeum) growing in the garden.

How to Grow

Much like Cinnamomum zeylanicum rolls , cinnamon fern require sure ingredient for success . Here ’s the formula for growingO. cinnamomeum :

Climate and Exposure Requirements

Temperature - wise , this flora is pretty versatile – it ’s able to grow in USDA Hardiness Zones 3 to 9 .

Like most ferns , O. cinnamomeumdoes well in full to partial shadowiness . And it can even tolerate deep wraith .

Soil Requirements

In summation to an acidulous soil pH , O. cinnamomeumrequires extremely fertile soil that drains quite well .

Specifically , a pH range of 4.5 to 6.9 is satisfactory . Add a couple inches of constitutive matter such ascompostor rotted manure to the soil each fall to improve rankness . check that to really ferment it into the territory above the root geographical zone !

Irrigation and Fertilizer Requirements

As a plant that ’s unremarkably find near woodland brooks or streams , cinnamon ferns love moist soils . Choose a moist but well - draining location , and preserve moisture as needed by irrigating well whenever the surface of the soil feel wry .

Over time , you ’ll advance an nonrational sense of whether the soil actually feel dry or not – betimes on , it can be pretty gentle to slip cool stain for wetness , and vice versa .

Most of your industrial plant ’s nutritional bases will be cover by amending the nearby soil with organic matter . An program of slow - spillage , balanced fertiliser in spring will be frost on the cake .

discover more tips on fertilizing fern here .

Growing Tips

Maintenance

Giving any rugged or necrotic fronds that you see the ol’ “ snip - snip ” with sterilized scissors grip should help keep your Ceylon cinnamon tree ferns healthy and look ship - conformation !

mulch the soil around the crown of your plant life each outpouring with a few inches of pine straw or fall leaves will mime the wet - conserving conditions of a forest floor , along with ply a rude - looking esthetic .

Where to Buy

The go - to places for gain plants are garden centers or plant workshop , while plant swaps and exchange divisions with a friend can also serve to build meaningful relationships with your fellow unripened pollex .

But if all that human fundamental interaction sends chills up your introverted prickle or you ’re short on prison term , many online marketer will hook you up with a Ceylon cinnamon fern to be deliver to your home , no small public lecture command .

Cinnamon Fern

The Home DepotandNature Hills Nurseryhave cinnamon ferns useable for purchase .

Managing Pests and Disease

All it takes for disaster to strike is the little of vulnerability .

Exhibit A : the thermal exhaust system embrasure that Luke bourgeon two proton torpedo into , which result in the first Death Star bluster up in “ Star Wars Episode IV : A New Hope . ” Exhibit B : an improperly cultivated industrial plant , which could leave behind you with a garden - wide infestation or infection .

right care makes for healthy plants , and healthy plants can better do by pests and pathogen . We do n’t want to have to work up a 2nd Death Star here .

Herbivores

There ’s not much to worry about when it come to our furred , botany - munching ally . Especially deer and rabbits – cinnamon ferns are quite resistive to them .

Insects

Managing insects also works to manage disease , since bug can vector pathogens between dissimilar plantings . But when it comes toO. cinnamomeum , there ’s only one major creepy - crawly worth worry about …

Also known asPapaipema speciosissima , the Osmunda or regal fern bore bit moth has a wingspan one - and - a - half to two inches long , and a fuzzy Orange River and grey - brown body .

The forewings are orange and striped , with two musing notch each , while the rearward wings are a grayish - brown with hoary , ruby markings .

These pests bring forth larvae that drill hole into the roots of ferns such asO. cinnamomeumin summertime after a period of overwintering in nearby grunge or plant debris .

This root drilling manifestly damages said ascendent , along with causing problem above the grunge short letter such as frond wilting , yellow , and overall stunted growth .

Along with clearing away any works detritus , dustingdiatomaceous eartharound the root zones of your cinnamon ferns can facilitate to prevent larval boring .

If infestation has already occurred , good nematodessuch asH. bacteriophoraandS. carpocapsaewill parasitize the larvae . incline any plant life with symptoms that translate it too far gone .

Safer Diatomaceous Earth

safe brand diatomaceous earth is available in four - Lebanese pound packagesfrom Amazon .

Triple Threat Combo

Arbico Organicsoffers a “ Triple Threat Combo ” ofH. bacteriophora , S. carpocapsae , andS. feltiaethat ’s certain to targetP. speciosissimalarvae with uttermost prejudice .

Disease

Sterilizing garden tools , propagating from healthy plants , and using pathogen - innocent soil are all easy and efficient method acting of preventing disease occurrent .

Whenever anO. cinnamomeumis sit in soil that does n’t debilitate well , its roots can become waterlogged .

extravagant wet prevents the roots from contract up enough oxygen , which leads to stunted increase , necrotic crowns and solution , wilting , and/or chlorotic foliation .

Additionally , certain pathogens love wet conditions such as oversaturated soil . Such environments encourage their presence and subsequent infection .

There ’s not much you may do reactively besides pitching septic and rotted - out plants , so it ’s best to focus on prevention .

ward off overwatering and ensuring that the soil is well - draining are the two most significant things that you could do to forestall rot .

Best Uses

Since these Guy love moist ground , placing them along the banks of a watercourse on your property such as a flow or pool would be both a smart and aesthetical choice .

A tune of cinnamon ferns shit for an good delimitation , and masses of them work admiration for filling in empty place in the landscape .

Their fronds put up a nice backdrop for plants with take up non - green colour , too – arum lily lilies , irises , and fritillaires are all coloured specimen that thrive in moist soils .

Quick Reference Growing Guide

From Tiny Spore to Garden Decor

A new distich of glasses and a slightly different haircut made me feel like a raw homo when I was clean out of college . But my meager freshness - up does n’t concur a candle to the cinnamon fern , which gloriously springs from a simple spore in less than a class .

I ’ve sire ta tippytoe my hat toO. cinnamomeum . Tough , downhearted - maintenance , and just plain stunning , this is a plant that truly deserves its royal condition .

Want to keep the fern journeying going ? Then hops aboard the pteridophyte train :

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Joe Butler