On this episode, we’re tackling Phosphorus – an element, crucial to life on earth, which exists in both abundance and scarcity. We cover how humans got hooked on P fertilizers, the political and environmental impacts of mining and pollution, and what might be done about it.  Mentioned in this episode:  City of Austin Algae Mitigation;Toledo Junction Coalition Interview; Points North Podcast; US EPA explanation of phosphorus processing waste product storage; Florida Public Radio story...

On this episode, we’re gettin’ down and dirty with sheet mulch. Sheet mulching is a no-till, no-dig gardening practice of removing unwanted vegetation and building fertile soil by layering organic matter and letting it compost in place. While the layers suppress weeds by blocking sunlight, subterranean soil biology goes to work to break down the layers into new soil. The beauty of this simple practice is that you can do it at any time of year with materials you have on hand (like cardboard,...

"Fruit trees need hands-on care." That's the motto of our guest, Susan Poizner of OrchardPeople.com. Susan is an urban orchardist, teacher, journalist, and filmmaker. She is the author of Growing Urban Orchards (2014), cofounder of the Ben Nobelman Park Community Orchard in Toronto and the host of the Urban Forestry Radio podcast. She also teaches fruit tree classes on her website. Colleen was eager to interview Susan after taking her online courses. Susan gives us the basics on why fruit...

In this roundtable, we talk about drafting and drawing with Lisa Nunamaker, of Paper Garden Workshop, and Amy Fedele, of Pretty Purple Door, two fabulous garden educators who offer online courses in landscape graphics. Leah took courses from both instructors this year -- Lisa's Garden Graphics Toolkit and Amy's Great at Procreate.  We discuss why the fundamentals of hand-drafting remain so valuable to the design process; the role of digital design programs like AutoCAD; and how tablet apps...

A rose by any other name would smell as sweet, but some of the common names we use for plants downright stink! In this episode, we're diving into problematic colloquial names. Some common names are geographically misleading (“Jerusalem artichoke”); others are xenophobic, racist, or antisemitic ("wandering Jew"); while still others are an unfortunate combination of both (“Turk’s cap”).  While it's probably too much to expect everyone to start using Latin names for plants, we can adapt new...

Attention plant lovers! Central Texas Seed Savers is hosting a Seed Swap at the Austin Central Library (710 W. Cesar Chavez St) on Saturday, October 29 from 11-1pm. This event is free and open to the public.  Bring seeds to share! Or just come get some seeds! For more info, visit https://www.centexseedsavers.org and https://library.austintexas.libguides.com/seedsandsustainability

In this episode, Colleen unearths as much as she can about the largely unwritten history of plant pots. When did humans start growing plants in containers? How did innovations in materials and technology lead to the domestication of plants, plant collecting, and the growth of the nursery industry? Why are plant pots so overlooked as a facet of industrial design? (We can rattle off several iconic chair designs, but flowerpots? Not so much.) Why don’t the standardized names of nursery pot...

We're back with a salute to Monty Don, beloved British gardening expert, author, and fashion icon, whose infectious passion for plants is boosting our spirits through this bummer summer.  Though little known in the US, jaunty Monty is a big celebrity across the pond, as the host of the BBC's Gardener's World, Big Dreams, Small Spaces, and Around The World in 80 Gardens. With his soothing temperament and sharp insights, he's a bit like a cross between Anthony Bourdain and Mr Rogers.  We...

On this episode, we dive into ecologist Douglas Tallamy's books Nature's Best Hope (2019) and The Living Landscape (2014, with Rick Darke). Tallamy's work takes native plant gardening and wildlife gardening to another level by focusing not just on species diversity, but on diversity of species interaction to promote ecological conservation. According to Tallamy, "native" plants are those which have "evolved in a given place over a period of time sufficient to develop complex and essential...

We sat down at the picnic table with John Hart Asher, host of Central Texas Gardener and Cofounder/Senior Environmental Designer at Blackland Collaborative to talk about pocket prairies. What’s a pocket prairie? It’s a very small prairie. What’s a prairie? It’s a community of native grasses and forbs wildflowers that have evolved along with microbes, plants, and animals over millennia. This "disturbance-driven ecology" historically relied on periodic fire and low-frequency, high-intensity...

Happy New Year! We’re back from vacation with a discussion of a book that is very much in the Horticulturati wheelhouse, The Know Maintenance Perennial Garden. Author Roy Diblik, a Wisconsin-based designer and plantsman, argues that anyone can build a “design-magazine-worthy garden at home” by thoughtfully combining perennials to form functional plant communities that need little more than an annual mow – almost no irrigation, mulch, or hand-pruning required. This low-maintenance method...

If you have a passion for plants, you probably love plant shopping. Our local garden centers are more than just a place to source nursery stock; they’re a designer’s trove of botanical information and inspiration. After untold hours spent perusing the grounds of Barton Springs Nursery, we finally sat down for a chat with two of the new owners, designer Amy Hovis and horticulturist Willy Glenn.  Founded in 1986 by Bernardine and Conrad Bering, Barton Springs Nursery is an Austin institution....

A year ago, we recorded a long and rambly episode on garden design. Now we're making it an October tradition! Revisiting the subject, we realize our approaches to design have changed, but we're still hell-bent on questioning basic tenets. How important is color? Are foundation shrubs necessary? Should we flip the script on "seasonal interest?" Does "timesharing with plants" really work? Join us at the picnic table as we parse out some jargon (form, texture, verticality), swap tips, and get...

When you have too many plants, it's time to make more! That's gardener logic for you. Fall is a great time to divide perennials and save seeds - but how? We dig into these methods of backyard propagation and again give you permission to be ruthless and/or lazy in the garden. Go ham on that root ball! Let the veggies bolt! Plants can handle it. Up first: Leah has a design question and Colleen scours the streaming platforms for Monty Don.  Please join the Horticulturati on Patreon!  Mentioned...

Fresh off a hometown visit to Cleveland, Colleen brings us the story of the Cuyahoga: a river once so polluted with industrial sludge, it burned. At least thirteen times. While the largest and most damaging conflagration occurred in 1952, it was the 1969 river fire that made national headlines, thanks to Mayor Carl Stokes. As one of the first Black mayors of a major American city, the charismatic and media-savvy Stokes connected the dots between economic inequality and environmental...

At long last, here's the second installment of our bee-stravaganza! Leah interviews beekeeper Tara Chapman, owner of Two Hives Honey, about the intricate connection between bees, plants, and weather. Then, your hosts discuss how to be a good steward to honeybees--and native bees and other pollinators as well. Even if you're not a beekeeper, there are many things you can do (or not do) to be a friend to the bees!  Mentioned in this episode:  Instagram's @mr.mrs.beeRescue and...

Enter the hive with us for another classic critter topic: BEES! We recorded so much on bees that we have to split this bee-nanza into a two-parter! In part one, Leah suits up for a tour at Two Hives Honey in Manor, Texas, and investigates honeybee ecology. In part two, we’ll focus on how, as a gardener, you can support our honey-making friends (along with native bees and other pollinators).  What are honeybees? Why do they live in boxes? And how did Apis mellifera, just one of tens of...

Welcome to Hothouse Season 2! If you follow any flower farmers on Instagram, the romance may be all too tempting: picture yourself quitting the city, fixing up an old farmhouse, and spending your days harvesting flowers and arranging bouquets on a ten-acre homestead. Now imagine doing that in a fire-prone, flood-prone, deer-pressured, rapidly developing portion of Austin without access to well water or an agricultural property tax exemption. Sam Eberhardt and Dan Poole are farming on the...

Springtime is owl time. Owlets be hatching. Fledglings be fledging. Owl  cams be streaming. Enter, with us, the kingdom of the night, as we celebrate these mysterious and beautiful birds. Drop us a line at www.horticulturati.com or call the Hotline at 347-WAP-HORT. Please join our Patreon!  Mentioned:  Merlin and Minerva's website, Instagram, and live Twitch stream; Austin Birds on Facebook; “Why is the owl considered a wise bird in the West and a symbol of foolishness in India?” (Times...

We're live from Zone 8b with a tell-all about the "epistemological quandary" that is the USDA Plant Hardiness Zone Map. What is hardiness? How is it quantifiable? And how useful is the USDA's classification system for gardeners grappling with extreme weather? Listen to find out.  First up, some tree news -- some of it shady. Last but not least, we get our first-ever call to the Horticulturati Hotline! Thank you Misti from The Garden Path Podcast for your sharing your Big Tree journeys.  ...

On this Horticulturati, we return from hiatus with tales of the Snowpocalypse -- or  Snowmageddon, Snowvid, whatever you want to call it -- to document the record-breaking winter weather that broke Texas' electric grid and ushered in a scary new climate reality for the plants and people of the Lone Star State. Your hosts discuss personal trauma, a jumble of conflicting post-freeze plant advice, and a bunch of anecdotes about what worked and what didn't in preparing our gardens and ourselves...

On this episode, we discuss virtual foliage, time travel, and big trees. Colleen looks into how video games might play a role in curing plant blindness, and Leah shines a light on the remarkable life and legacy of Margret Hofmann (1925-2012), whose 1970s “Think Trees” campaign introduced Austinites to a majestic urban forest hidden in plain sight. As a City Council member, Hoffman advocated for the preservation of heritage trees, spearheading a contest to locate our city’s biggest and oldest...

Fertilizers...oxidizers...explosions! We’re still trying to wrap our brains around Ammonium Nitrate over here, so we called on science superstar Dr. Kate Biberdorf, aka Kate the Chemist, to help us out. What is Ammonium Nitrate, and why is this volatile chemical so ubiquitous? What are the conditions that create fertilizer explosions? Is synthetic fertilizer safe? We ask these questions and more, then find ourselves back down the philosophical rabbit hole: questioning our assumptions about...

Autumn has come to Texas at long last! To celebrate, we watched the documentary Five Seasons: The Gardens of Piet Oudolf (2017) by Thomas Piper, and we're now officially card-carrying Piet stans sporting Dutch accents, asymmetrical haircuts, and scythes. We discuss Oudolf’s “mathematics” of design, seasonal ambience, and the art of garden editing. How might we translate Oudolf's temperate palate to the not-so-temperate climate of central Texas? Drop us a line at horticulturati.com or a leave...