RADICLE Thinking

This post is about roots. It also marks the start of the new name for my Perfect Earth monthly posts: Radicle Thinking. The radicle, a root, is the first thing that emerges from a germinating seed, and the future of a plant depends on the radicle’s success. Seeds, miraculous tiny germs of life, are held in suspension until the world around them says, Okay, GO! A radicle then sets out to explore and engage with what it finds. It heads down into the soil to anchor the new plant, and then starts sending up water and nutrients so the plumule (the embryo’s shoot) can grow up towards the sun and start the true leaf growing process.

The radicle and the lateral roots that follow it form a root system of insanely intricate and mutually beneficial relationships with the microorganisms in the soil. These root systems form part of a two-way delivery system: nutrients and water from the soil flow up into the leaves, while sugar made from sunshine (photosynthesis) is sent down from the leaves to the roots to energize a vast community of busy soil-based lives. Roots+soil+leaves+sun = the essential building blocks of plant life.

My interest in roots and radicles makes me think about the fact that few of our commercially available plants are grown from seed. Most are cloned, propagated asexually by cuttings or tissue culture—they have no radicle. Instead, these genetically identical plants are created to meet the needs of the horticulture industry: easy to grow (compact, fast growing, unappealing to insects), easy to ship (short and tight “muffin-tops”) and easy to sell (big, bright flowers). These cultivars are often given cutesy, easy to remember, wince-worthy names, like “Incrediball”, “Pinky Winky”, and “Miss Piggy”. Many are patented, with the “inventor” getting a royalty for every plant sold. Specialty plant propagation of this sort has become very big business, encouraging lots of people to shop and plant varieties that would seem to be great for greening up the world. But how is it working for those plants and our ecosystem? We aren’t yet sure. Ecologically sensitive gardeners, especially native plant enthusiasts, are carefully watching to see how these plant clones will behave in the landscape, serve beneficial bugs and birds, and react to threats from things like pests and disease. Time will tell.

And what about the impacts of starting life without a radicle? Vegetative (seed-free) propagation relies on adventitious roots, which originate from stem tissue (not the radicle). They are fibrous, tangled, and often found circling the bottom and sides of the container in which they were grown. Can they do the same job as root systems with a radicle, formed by the natural process of seed germination? We know that asexually propagated plants will sometimes "revert" to their original species form, or otherwise grow out of the commercially driven traits that made them desirable to begin with. This is often not a concern for the breeders since replacing failing plants is good business. But it isn’t great for creating sustainable gardens, and it’s especially not great for trees, which are all about being around for a long time. I’ve been noticing clonal nursery trees, which have nothing but adventitious roots, showing signs of suffering as they age. Their fibrous, adventitious root systems have a tendency to wrap around and choke the tree (called girdling roots), which causes trees to die back a little at a time and weaken or even snap at the base. (Learn more about it here.)

Take a look at the trees in your yard, neighborhood, and community. How many of them were grown from seed right where they were dropped by their mother tree, assisted by her mycorrhizal network? Sadly, there isn’t much opportunity for this to happen in our managed lands.

So, if you find an acorn sprouting, save it. Try to plant trees grown from seed, no matter how small. Yes, it is a slow process, but think of them as your family. Don’t we love the process of raising our families from birth? The natural process of putting down a root and letting it grow is one that has evolved naturally and successfully for every life form. It connects us to nature and makes us happy and whole.

RECOMMENDATIONS

Resource: The Native Plant Trust's Go Botany is easy enough to hook beginners and deep enough to engage geeks. Learn how to identify plants and delight in the plant of the day.

Book: Forest Forensics: A Field Guide to Reading the Forested Landscape , by Tom Wessels (W. W. Norton & Co, 2010)

Quote: "We are as gods and might as well get good at it. So far remotely done power and glory—as via government, big business, formal education, church—has succeeded to the point where gross defects obscure actual gains. In response to this dilemma and to these gains a realm of intimate, personal power is developing—power of the individual to conduct his own education, find his own inspiration, shape his own environment, and share his adventure with whoever is interested." Stewart Brand’s statement of purpose, Whole Earth Catalogue , 1968.

Photo: Thale Cress (Arabidopsis thaliana) about two days after germination from seeds by BlueRidgeKitties.

I like learning about things that are obvious once I know how to look for them—things that were often common knowledge in the past. In spring, birds are telling stories about where they choose to raise their young, stories based in logic, with a dash of magic. Here’s what I’ve learned:

1) Birds don’t actually live in nests.

Well, I guess it depends on your definition of live. Birds lay eggs and raise their young in nests. But once the kids have flown away, the parents either renest with a new brood that season or abandon the nest for the wild. The nests you are probably imagining right now are most likely found hidden in a dense leafy shrub or in the canopy of a tree, where they provide shelter from weather and camouflage from the sharp eyes of predators. Different birds have different nesting strategies (form, technique, and material).

A simple cup-shape is the most common nest type. You can find them in any number of places, such as along branches in the tree canopy, perched in tree forks, or nestled on ledges.

Birds that Build cup Nests: Northern Cardinal, Barn Swallow, Ruby-throated Hummingbird, American Robin, varieties of warbler, as well as other passerines.

2) Not all birds make nests.

Or, rather, not our idea of a nest. Some birds can get by with just a depression in the ground called a scrape nest. Scrapes are popular nest types for terrestrial birds (birds that prefer grasslands and open habitats that lack trees), such as shorebirds or tundra species.

Birds that Build Scrape Nests: Bob-white Quail, Killdeer, American Avocet, Common Tern, Piping Plovers, and many other shorebirds.

Other birds are cavity nesters which take advantage of holes found in place like dead tree trunks. Some line their place with coziness, but many just lay their eggs in the space as is. There are varieties of Owl that return to the same cavity for many years to raise their young, building up a “nest” from their own poop and their kids’ poop, too. When they’re not raising kids, these Owls roost on a branch near their cavity. You can sometimes spot them by finding their pellets beneath the trees.

Birds that Use Nest Cavities: Carolina Wren and House Wren, Eastern Bluebird, all Woodpeckers, Sapsuckers, Nuthatches, Prothonotary Warblers, Chickadees, and Owls.

There are also platform dwellers (Ospreys and Eagles), mound nesters (Mallard ducks), tunnel makers (Belted Kingfishers, Atlantic Puffins), pendant builders (Baltimore Orioles), and those who chose no nests at all (Chuck-will’s-widow). It all depends on what quality habitats are available where they live.

3) Most birds don’t re-use their nests.

It all comes down to capacity and energy resources. Small birds often make their nests from delicate materials that don’t weather well. While some of them will reuse their nests to raise another brood or two in the same season, they almost always build new ones the following spring. Starting from scratch reduces the possibility of ectoparasites (mites, lice, etc.), which can negatively impact the health and survival of chicks. It also helps avoid predators who know the locations of the nests from last season. Big birds, like Bald Eagles and Ospreys, who can carry large branches and twigs, will return year after year to the same nest, adding to the old one and making it larger over time—unless another bird steals it first.

4) What about Birdhouses?

For cavity nesting birds, birdhouses replace lost habitat, like standing dead trees. So the answer is yes, birdhouses are good. In fact, they have helped restore populations of Eastern Bluebird and Prothonotary Warblers. They are even better when they are cleaned out each spring to reduce the populations of mites and other pests from the previous breeding season which can harm the newborn chicks. Don’t worry about doing it wrong, the birds will only select the ones you do right.

Birds likely to use birdhouses (nesting boxes): Wrens, Bluebirds, Titmice, Chickadees, Nuthatches, and Owls.

5) What about the way YOU nest?

Your garden lifestyle is intricately connected to the life of birds. Think about it from the birds’ perspective and relate it to your place.

• Leave a dead tree or two, for food (insects) and nesting opportunities.
• Plant shrubs in groups. Dense clusters of varying heights provide options and protection.
• Plant natives with lots of fruit.
• Resist the urge to prune shrubs. Instead let them grow into their original natural shapes: tall, short, dense, twiggy.
• Leave a matrix of habitats including places on the ground that you don’t mow or “tidy up.”
• Make habitat piles with fallen twigs.
• And yes! Put out some birdhouses.

6) What to Plant?

Shrubs and small trees that provide great food and nesting areas. Most of these fruits are delicious for you too, but most often than not the birds will get them first. Don’t worry about insects, birds will eat them too. In fact, caterpillars are the primary food for their young. Here are some of my favorite native trees and shrubs:

• Arrowwood viburnum (Viburnum dentatum)
• American beautyberry (Callicarpa americana)
• Chokeberries (Aronia spp)
• Eastern red cedar (Juniperus virginiana)
• Elderberry (Sambucus nigra)
• Highbush blueberry (Vaccinium corymbosum)
• American holly (Ilex opaca)
• Shad (Amelanchier canadensis)

Learn about the keystone plants, like oak trees, which support more than 400 species of insects and are vital to bird survival, in your area by visiting The National Wildlife Federation. Here is the list for the Northeast: Eastern Temperate Forests.

With thanks to Chris Gangemi and Matt Jeffery.

RESOURCES

To learn more about birds:

American Bird Conservancy
Cornell Lab of Ornithology
The National Audubon Society

ARTCILES

Types of Bird Nests (The Spruce)
Birds That Build Nests With Domes May Be Doomed (NYT)

RECOMMENDATIONS

Book: Love Letter to the Earth by Thich Nhat Hanh is a little handbook of consciousness to guide your relationship with your land. When you see it this way, you just can't use harmful practices.

Quote: “I think having land and not ruining it is the most beautiful art anybody could ever want.” – Andy Warhol

Podcast: For the Wild: TIOKASIN GHOSTHORSE on the Power of Humility. Thought provoking ideas about our relationships to nature and "saving the earth.” Try going outside with these ideas in mind.

American Robin on her nest, photo by wwing from Getty Images Signature.

In November, I wrote about why it is so important to keep biomass (organic matter) on your property and some easy creative ways to manage various types such as branches, leaves, grasses, and garden clippings (Closing the Loop, Part 1).

The way to make the bulk of your biomass into free fertilizer is composting. It is the best-known way, and the most misunderstood.

Composting is simply the act of decomposition; like aging, it is inevitable, just do nothing at all and your various landscape stuff will eventually break down into the ground; that is what happens in the wild. If composting is so easy, and so important an environmental act, why doesn’t everyone do it?

In the managed landscape we like to play a role in how and where the decomposing happens, so we make compost piles. Anything organic can go into a compost pile, and if you just leave it, you will, eventually, absolutely have compost.

But, without some assistance, the process will be slow, and, depending on what you put in there, it could attract pests. In an informal survey of young homeowners (courtesy of my niece April) the amount of work required, the amount of space needed, and the possibility of smells and rodents came out as the top reasons why people don’t compost. But do not worry, these are all very easily overcome.

You really should be composting.

Composting relies on microbes, which can do the job with oxygen (aerobic) or without oxygen (anaerobic). Home composting is aerobic; the key components for happy, hungry microbes are the right balance of air and water. Happily, microbes are very tolerant. If they aren’t getting the right balance, they just slow down.

WORK: You can do nothing and let your compost pile break down slowly or you can help with the air and water to make the microbes more active. Turning a compost pile keeps it aerated. Occasional watering keeps it from drying out. Covering with a tarp helps keep the moisture in but also keeps it from getting too wet. The more you work to keep your pile turned and the right amount of moist, the faster your compost happens.

Compost piles can be cold or hot. Hot compost heats up and kills off pathogens and weed seeds. It is faster than cold. It requires a carefully monitored mix of nitrogen, carbon, water, and oxygen. Sometimes compost heats up all by itself but creating a reliably hot compost is a lot of work. Hot compost is important for garden nerds and compost professionals, but as I think EVERYONE should compost, I focus on the easy version, cold composting. It is simple, it works. It closes the loop just fine.

COLD COMPOSTING (it is logical, there are no mysteries):

If the dire news of the climate crisis is making you feel overwhelmed, why not make some promises to a piece of earth. If everyone made their property, or one they frequent, into a natural refuge, there would be much less to worry about.  

Here are some of our promises…send us one of yours.  
 
1. I will think of my place as my friend, my family. I will work with, not against it, and do it no harm. It will be a sanctuary.  
2.  I will let this place keep all that it produces: no biomass will leave the property.
3.  I will make a compost pile, even if I probably won’t turn it.
4.  I will carefully consider everything I bring here—can it be used for a long time, can it be composted or repurposed, does it really need to be plastic? 
5.  I will use no toxic synthetic chemicals. 
6.  I will take a moment to learn about an insect before I decide if I really need to kill it. 
7.  I will plant native plants to provide habitat for insects and birds. 
8.  I will get to know the names of all the plants, animals and insects that live in this place, or at least the big ones.
9.   I will reduce the size of my lawn to just what gets used.  
10.  I will let go a bit, let nature be my collaborator, and help me keep my promises.  
 

July 23, 2019
On Beyond Milkweed   
Now that everyone LOVES milkweed, what’s next?  Milkweed only serves one insect, the Monarch Butterfly. You can do more! How about adding some other historically “weedy” native wildflowers to your garden and expand the pollinator banquet?  How about Thistles? They provide pollen, nectar, leaves and seeds for hundreds of insect and bird species. They are beautiful and structural, and seriously deer proof! There are some invasive ones and massive eradication programs have pretty much wiped out the good with the bad, so...

Do your bit for the good ones, get to know your thistle. 

If the answer to ALL these questions is NO, you probably have a native, let it be! 
Is the thistle spiny along the entire length of the stem? 
Are the bracts (the bulbous part below the brushy flower) triangular, firm, and spine-tipped? 
Are the bracts thick, and leathery, and jagged? 
Are the roots rhizomatous (running underground and popping up all over)?
The thistle in the photo inspired this tip. Found it growing in my yard, Goldfinches love the seed. Somewhat common on LI, endangered in Ct. Keep an eye out for some of your own and welcome it to your expanding world of pollinator plants. 

Thanks to Lindsay Karr https://weedwise.conservationdistrict.org