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The Impatient Gardener

Plants

Seed abuse in the name of cool plants

March 21, 2023

There is a tendency to think of plants as delicate things that require coddling, but some demand the opposite treatment.

That’s how I found myself in a full-on assault a couple weeks ago as I engaged in the abuse of Brazilian fern tree seeds. The three-quarter-inch long, flat seeds were hard as a rock and the package they came in suggested it could take up to 180 days to germinate. I have better things to do than wait half a year for seeds to germinate so to speed up the process, some scarifying was in order.

This process of breaking down a seed’s hard outer coating, which protects a seed against harsh environmental conditions in its natural habitat, is necessary for germinating seeds “in capitivity” and involves several methods including nicking, soaking and scratching.

The rock-hard seeds of the Brazilian fern tree, also called Brazilian firetree (Schizolobium parahyba), received a combination treatment of sanding the edge with 80-grit sandpaper followed by a one-minute soak in boiling water. Sanding is a common method of scarification, but the boiling water method is reserved for the toughest seeds. Soaking for a few hours in tepid water is a widely used practice for seeds such as nasturtiums and peas. 

Sanding a hard seed to scarify

Some firm sanding on a piece of 60-grit sandpaper was the first step in working through the hard seed coat. Then I put them in boiling water for about a minute.

seeds in boiling water

My decision to attempt to grow this plant happened within about two minutes of seeing it for the first time. I was intrigued by the plant mentioned in a gardening webinar by Janet Draper, a horticulturist at the Smithsonian Gardens. She’d picked up a spare plant from Chanticleer Gardens in Pennsylvania and watched it grow into a monster specimen in a single season.

It’s not a fern, but its long leaves, covered  with 40 to 60 leaflets, resemble a fern. Native from Central America to Brazil, it can grow up to 10 feet in a single season. I’m intrigued by incredibly fast-growing plants and recognized it immediately as an excellent experiment for this gardening season. I ordered seeds before the webinar ended.

Large, bright yellow flowers cover the tree in tropical areas. Even if it grows well for me, I don’t expect to see flowers.

A Brazilian fern tree growing in its native range. I have no such expectations for my seed. Mauro Halpern photo

I haven’t found any information on growing this potential behemoth in Wisconsin, but I know enough about it to have a good guess at the conditions it will appreciate: full sun and rich, moist soil. 

I’m all about this feathery foliage. Photo credit

I planted the abused seeds in moist seed-starting mix at the end of February and have had them under a humidity dome and on a heat mat in my best attempt to mimic Brazil’s forest floor. As I waited impatiently I noticed something I’ve never seen seeds do before: the seeds grew. They are actually got longer. I assume this was caused by  the seed coat softening or breaking down in preparation for germination, which did happen for one seed after about two and a half weeks.

Five seeds came in the packet and I only planted two, an heir and spare, if you will.  I can always take another crack at growing this plant with the rest of the seeds, perhaps trying out a different scarification method.

If my seed abuse works, the experiment can continue, and perhaps I’ll have an oddly large, tropical tree growing in my summer garden.

brazilian fern tree scarify seeds
by Erin @ The Impatient Gardener 
7 Comments

About Erin @ The Impatient Gardener

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Comments

  1. Elaine Rabuyanov says: March 21, 2023 at 6:25 pm

    Thank you for sharing very informative

    Reply
  2. Sue Starr Rogers says: March 22, 2023 at 12:22 am

    Fascinating! And I love how you write…. it’s just like you talk. Keep these coming, I always learn so much!

    Reply
  3. Jules says: March 22, 2023 at 8:15 am

    Cool! Love a seed starting adventure. Beautiful payoff if all goes well!

    Reply
  4. Lbpv says: March 23, 2023 at 7:23 am

    This should be fun! Keep us posted.

    Reply
  5. Kathy Faragalli says: April 9, 2023 at 6:14 am

    Hi Erin, long time reader first time commenter. Inspired by this post I impulsively ordered 5 Brazil tree fern seeds from etsy. I soaked them overnight, put them in boiling water and nicked with a finger nail clipper. I put them under a dome in my “plant closet” which is equivalent to the the surface of the sun (light, warmth, wind) they germinated in 4 days. I’m so excited but also slightly concerned with next steps. Currently search the world wide web for a container look larger enough to accommodate my new plants. I’m going to chanticleer in May and may have to stalk this plant. Have you had any luck with your seeds? I would love to follow along – keep us posted!
    Thank you for everything you do! Love the content and blog.
    Kathy

    Reply
  6. Ambuj says: July 6, 2023 at 4:07 am

    By practicing responsible seed use, considering the ecological impact of plant choices, and engaging in sustainable cultivation methods, we can strike a balance between enjoying unique and fascinating plants and preserving the environment.

    Reply

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The Impatient Gardener

Do you love gardening? Me too! I'm Erin and I garden in Southeastern Wisconsin, zone 5. The Impatient Gardener is all about real-life gardening: the good parts, the bad bits and even the funny stuff. It's part information, part inspiration and a little bit commiseration. Thanks for visiting.

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Erin Schanen 🌿 The Impatient Gardener
Well you’ve seen simple, this is clearly not tha Well you’ve seen simple, this is clearly not that. Let’s just say I threw a lot at this window box. 

Metal ring (inspired for years by Deborah Silver) was made by a local metalworker. 
Greens: fir, cedar, juniper and magnolia 
Branches: budded willow, cardinal dogwood and fantail willow
Garnish: pinecones, faux berries, faux amaranth and faux fuzzy ball things

My takeaway from this container is that I need more windows and a much bigger window box. 😀
This is what happens when it’s nice enough out t This is what happens when it’s nice enough out that I can actually feel my fingers. One minute you’re hanging garland like you do every year and the next minute you’re pilfering dried flowers from your hydrangeas and sticking them everywhere. 

This all started because the bay that I bought in the cartload sale at the nursery in August is still very much alive and looking good, so I transplanted it to the pot outside the garage (last picture). But it needed a little something to fill out the pot and I glanced around for what I might have and the next thing you know, I’m harvesting hydrangeas like crazy. 

If I had given the garland even a couple minutes of thought before I started throwing things in there I would have gone for an asymmetric look, but when you’re working outside in winter in Wisconsin, done is done.
If it were only this easy.😀 If it were only this easy.😀
Are you on Team Simple or Team Elaborate? For as Are you on Team Simple or Team Elaborate?

For as much as I love creating somewhat elaborate winter containers, I’d still never be without the simple ones. This is why the front of my house looks like Dr. Jekyll and Mr. Hyde were decorating. I simply can’t restrain myself to a theme or design concept. 

Anyway, this trough planter is in a spot that’s not easy to get electric to, so I don’t bother with lights. Cardinal twig dogwood, fir and magnolia are all it takes to give this the simple look I need after going nuts with other containers.
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