Growing Greener

Theresa Crimmins, Director of the USA National Phenology Network, explains why knowing the timing of natural events such as the annual bloom of different flowers and the emergences of their insect pollinators is essential to good gardening and shares how climate climate change is disrupting natural collaborations that stretch back over millennia.

Horatio Joyce, the Garden Conservancy's Director of Public Programs & Education details the rich opportunities his organization provides to tour remarkable gardens in every region of the United States, and the innovative opportunities for gardening education it provides both in person and online.

Rutger Myers of Eco-Cycle, a leader in promoting community composting programs for 50 years, discusses studies that indicate microplastics may be finding their way into the finished product and what you can do to prevent that.

A school of European and English garden designers, and now American ones too, claim their "designed ecosystems" of plants gathered from all over the world provide similar benefits to natural plant communities of locally co-evolved species.  Peter Adler, a plant ecologist at Utah State University, helps us explore the potential of such a practice.

Texan Ben Pfeiffer discusses his personal crusade for fireflies and the remarkable facts about their strange and colorful life cycles in this return visit to a conversation from July 2020

Sara Weaner Cooper describes how New Directions in the American Landscape is incorporating indigenous American approaches into Ecological Gardening and how by adjusting the growing conditions in her lawn she caused it to transform itself into a meadow of native grasses and wildflowers without the use of herbicides or other unsustainable practices. A replay of a July, 2024 conversation.

By storing excess heat from sunny days in the soil below his greenhouses, Tim Clymer keeps them warm on winter nights for a fraction the cost of conventional propane heat.

Dr. Rick Ostfeld of the Cary Institute of Ecosystem Studies shares thirty years of research on the ecology of tick-borne diseases in North America, detailing why landscape treatments such as pesticide sprays are unproductive as well as environmentally destructive, and outlines a very different approach to this public health threat.

Arya Natarajan of iNaturalist describes how that online platform's user community is playing a central role in monitoring changes in global biodiversity and the creation of climate resilient ecosystems

In "The Continuous Vegetable Garden" Charlie Nardozzi applies lessons learned from ecologically-informed gardening to bring vegetable and fruit gardening into a new, more sustainable, and less laborious era.

Emma Grover and Dr. Mauricio Diazgranados discuss a new program from the New York Botanical Garden to unite the thousands of botanical gardens worldwide in devoting their shared knowledge and resources for a coordinated, plant-based effort to combat the consequences of global climate change.

"Naturalism" is the dominant design style in ecological gardening, but what exactly is it?  Is Naturalism just mimicry of nature, or does it allow for the designer to include aesthetic principles to please the human eye?  Can it allow the gardener to enjoy favorite plants not indigenous to the area?  Duncan Brine, co-proprietor with his wife Julia of design/build firm Garden Large explains how he has defined Naturalism to create some of the most celebrated new gardens of New York's Hudson River Valley.

Are you troubled about supporting industrial agriculture and its mistreatment of animals by purchasing by-products such as manures and blood meal to maintain your garden's fertility?  British gardener John Walker, an award-winning environmental writer, shares the techniques he has used to make his garden cruelty free, self-sustaining, and sustainable in a conversation first shared in May of 2023.

Award-winning investigative journalist Carey Gillam exposed the corruption and suppression of evidence involved in the Environmental Protection Agency's original approval of the use of the herbicide Roundup and its active ingredient glyphosate on American gardens and farms.  In today's conversation she details the on-going suppression of evidence of its harmful impact on human and environmental health and discusses how the case about Roundup currently before the Supreme Court is designed to deprive its victims of recourse, and why Donald Trump has made increasing its production a matter of national security.

In a conversation first shared in February of 2024, farmer and author Joseph Lofthouse describes how to foster  "landraces," strains of vegetables and fruits adapted to the unique conditions in your garden.

James Hitchmough, an eminent British garden designer and former professor of horticultural ecology asserted on a previous episode that research confirms that gardens rich in alien plants support a greater diversity of insects.  Today, Matthew Shepherd of the Xerces Society, an organization founded to promote insect and invertebrate conservation shares a different understanding of the science.

Dr. Jason Downing of Fairchild Tropical Botanic Garden turns rare orchid propagation into an educational adventure for Miami area students, beautifies the cityscape, and rescues native Floridian species from the brink of extinction.

In this week's Growing Greener Heather McCargo, founder of the Wild Seed Project, describes its programs to encourage gardeners to grow native plants from wild-collected seeds to preserve genetic diversity in the garden and beyond, and how McCargo has embraced the evolution of her personal garden from meadow to biodiverse woodland.

One of the ways that invasive plants displace indigenous floras is "allelopathy."  In a conversation first broadcast in February 2024, Dr. Susan Kalisz of the University of Tennessee Knoxville describes how many introduced plants actually poison the soil so that indigenous species cannot germinate or flourish in their former homes.

Selecting disease-resistant cultivars is an essential tool for avoiding the use of pesticides in the vegetable garden.  Plant pathologist Nicole Gauthier of the University of Kentucky explains how to identify cultivars appropriate to your region and your garden, and why "tolerance" may serve you as well as "resistance."

As Dan Jaffe Wilder Wilder says "you can grow a lawn which is a whole bunch of green stuff.  Or you can grow a lawn that is a whole bunch of low-growing green stuff with some yellow, some blue, some white, some pink and some red mixed in. Which do you choose? "  Join the conversation with this native plant expert and learn how you can make your lawn not only colorful but also easier to maintain and supportive of the local wildlife and native flora.

Estimates of fungi diversity range into the millions of species, yet the vast majority remain unknown.  What is clear, says mycologist Gabriela D'Elia, is that your garden plants depend on the services provided to them by the indigenous fungi.

James Lord speaks of his mentor and inspiration Roberto Burle Marx, the painter, sculptor, musician, and botanist who found in Brazil's native plants the basis for a new style of landscape architecture and a language to celebrate the distinctive beauty of his homeland.

Citing European studies, British horticultural ecologist James Hitchmough, a leader of the ecological gardening movement in his country, rejects the intrinsic superiority of native plants over exotic garden imports for supporting insect diversity in the garden.

A square foot of topsoil typically hosts thousands of dormant seeds deposited by previous floras.  Nathan Lambstrom of Lambstrom Garden Ecology discusses his research into how this "soil seed bank" can enhance or derail ecological restoration, and how to manage your "account" to benefit your garden.

Is your pruning aimed only at gratifying your aesthetics and needs?  Chris Roddick also views pruning from the plants' perspective, promoting techniques that enhance their growth patterns and ecological function as well.

Travel with Growing Greener to Winnipeg, Manitoba to learn how Ash Burkowski is collecting seed from local prairie remnants to raise indigenous grasses and wildflowers that can be integrated into lawns, restoring populations of native flora while relieving homeowners of the need for fertilization and irrigation and reducing the need for mowing.

A replay of a February 2024 conversation in which Joseph Lofthouse, author of "Landrace Gardening" details how anyone can create genetically diverse vegetable and fruit crops that flourish in the local climate and soil with minimal inputs in just three years.

Byron Kominek knew the family farm needed a more profitable crop than hay to survive.  By installing  photovoltaic panels and growing crops underneath, he now supplies electricity to 300 neighboring houses while also producing food and hosting educational programs at what is now a popular learning center.

Liz Koziol of the University of Kansas shares hew work with mycorrhizal fungi and native plants, and how a properly designed fungal inoculant can make your ecological garden more biodiverse, quicker to establish itself and more resistant to weeds.

Herbariums, annotated collections of dried plant specimens first appeared in Italy almost 500 years ago.  In today's Growing Greener, Lea Johnson, Director of Conservation at the Native Plant Trust discusses why they remain an essential tool for those who track and study native plant populations, and the new technologies herbariums facilitate.

Dr. Elic Weitzel of the Smithsonian National Museum of Natural History describes the thousands of years of association between deer and people, how they long ago came to prefer human-created landscapes, and why their population has exploded

In a conversation recorded in December of 2019 Shannon Currey, a leading educator in the native plants industry, describes how the unique adaptations of warm season grasses make them winners in an era of climate change as well as invaluable in the late summer garden.

In a conversation from January of 2021, Dan Snow tells how, using locally sourced stone, he expresses the intrinsic beauty of a site in bold constructions held together only by gravity, friction, and history.

Goats love invasive plants, says Elijah Goodwin, Director of Ecosystem Monitoring at New York's Stone Barns Center; and with careful timing and regulation the Center's herd is restoring ecological balance to its 80-acre campus and hundreds of acres of a famous nature preserve.

Revisiting a conversation from August 2023 with Dr. Bethany Bradley of the University of Massachusetts, who describes how plants introduced from outside our ecosystems may remain quiescent for decades before turning invasive, and how climate change is threatening to explode this threat.

Wildlife biologist Ken Bevis discusses the many benefits to biodiversity of "snags," standing dead trees, and how to incorporate them safely and aesthetically into our gardens.

In a replay of a conversation from September of 2023, Sheri Crabtree of Kentucky State University describes the northernmost species of the tropical custard apple family, the pawpaw, which offers delicious tropical flavor, a creamy texture, and thrives in the backyard garden as far north as USDA Zone 5.

William Cullina, a leading expert on the propagation of native plants, describes the special insights about a species' adaptations and ecology that starting from seed provides, and offers simple tips for success with this endeavor.

'Good fences make good neighbors,' especially, according to Vermonter Susan Shea, when it comes to gardeners and woodchucks. A nature writer and photographer, Shea details the extraordinary abilities of this native mammal, the important ecological and cultural roles it plays, and how to install a woodchuck-proof fence.