Growing Greener

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.

Everything that grows on your property – its "biomass" – should remain there even after death, says this award-winning garden designer and founder of the Perfect Earth Project.  Fallen branches, leaves, even tree trunks as they decay reactivate a cycle essential to Nature's health, and are an opportunity for a different kind of beauty.

Overlooked by many gardeners, moths are actually more efficient as pollinators than bees and are the basis of the food chain for everything from bats and songbirds to grizzly bears

Expert tracker Jason Knight shares how to develop the ability to read animal tracks and signs to keep current with wildlife visits and to resolve wildlife problems peacefully and effectively.

Richard Hayden, senior director of horticulture for the High Line, describes how plants and gardeners collaborate in this ever-changing urban paradise

Beth Ginter, executive Director of the Chesapeake Conservation Landscaping Council, describes her organization's successful program to enlist an often-resistant profession as advocates for environmental activism.

How Village and Wilderness fosters diverse local solutions to a global problem

John Pitroff chose composting when his daughter's birth sparked dreams of leaving her a better world – and now he's addressing environmental problems while making a living helping local gardeners and farmers. 

Peter Del Tredici, Senior Research Scientist Emeritus of Arnold Arboretum and Visiting Lecturer of Applied Ecology and Planning at MIT explains the history of these garden pests why they can play an essential role in this era of climate change.

An accomplished and progressive garden designer, Pam Penick, author of "Gardens of Texas," shares ideas for ideas for using native plants in traditional and formal gardens garnered from her reporting on private landscapes of the Lone Star State

Leader of the Ecological Gardening movement Rebecca McMackin shares reasons why in a time of discouragement, gardening can restore optimism.

Last May Growing Greener featured the challenge that Plan it Wild, a rewilding design and installation firm, posed to American homeowners: to replace 25 square feet of lawn with locally indigenous plants.  Today we hear how nearly 10,000 people in 49 states committed to this 12-week online program, how backyard biodiversity flourished as a result, and how the challenge is expanding through neighborhoods to reach people who hadn't previously considered devoting their landscapes to reinforcing the regional ecosystem.

Nancy DuBrule-Clemente, a pioneer of organic land care, extolls the outstanding aesthetic and ecological contributions of goldenrods, a genus of native flowers too seldom seen in our gardens.

Edwina Von Gal, founder and president of the Perfect Earth Project, completes her interview of Growing Greener host, Tom Christopher, exploring his path to ecological gardening, the hope he finds in the remarkable contributions of young colleagues, and the most effective ways to reach out to the broader gardening public.

Edwina Von Gal, founder and president of the Perfect Earth Project, interviews Growing Greener host, Tom Christopher, about what led him from an education steeped in traditional gardening to helping found ecological gardening in the United States

Andrea Hurd of Oakland, California describes the way she structured Mariposa Gardening and Design Cooperative, Inc. to provide employee equitability and management experience for women breaking into the field, and the firm's commitment to celebrating the local landscape by enhancing habitat and working with indigenous materials.

Switching to more environmentally friendly practices is too often resisted by landscape professionals afraid to stray from familiar routines.  Mariah Whitmore and Tony Piazza, both prominent landscape business owners in the eastern end of Long Island, New York, discuss how they are increasing profits by adding Nature friendly land care to their repertoire.

Claire Chambers, founder of Meadow Lab, describes the roll-out sod her company is producing that can transform a landscape into a blooming, mature meadow of native flowers and grasses in a single growing season

A replay of a conversation from April of 2021 with Pollinator Conservationist Heather Holm about her multi-award-winning book, Wasps, Their Biology, Diversity, and Role as Beneficial Insects and Pollinators of Native Plants.