Tree collectors come in many different fashions, as author Amy Stewart explores in her new book, "The Tree Collectors: Tales of Arboreal Obsession." Amy joins me on the podcast this week to discuss tree collecting, what inspired her to write this book, and 10 of the 50 tree collectors she featured in the book.

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Margaret Roach is one of those heroes in horticulture and gardening media who I really admire. She excels at communicating her fundamental understanding of the natural world and reminds her readers and listeners to keep on digging, in more ways than one. She has been a guest on this podcast many times, and this week I am revisiting her first appearance, from back in 2017, where Margaret joined me to share simple yet timeless garden design lessons.

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Groundcover plants require far less maintenance than a turfgrass lawn and can also offer erosion control and ecological services, among many other benefits. To discuss groundcover solutions to lawn troubles, joining me this week is Kathy Jentz, author of "Groundcover Revolution."

Podcast Links for Show notes

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Our understanding of the soil food web has increased rapidly in the 21st century as microscope technology improves and soil biology research continues, and this opens new doors for gardeners and farmers to employ organic solutions for healthier, more vigorous crops. To explain how soil bacteria play an irreplaceable role in our gardens, my guest this week is gardening columnist and author Jeff Lowenfels.

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Some of the most important and ecologically damaging chemicals used in agriculture historically — and still today, in some cases — have their origins in warfare. To share the fascinating history of how these chemicals became prevalent and how the environmental movement fought back, my guest this week is Frank von Hippel, a professor of environmental health sciences and author of "The Chemical Age: How Chemists Fought Famine and Disease, Killed Millions, and Changed Our Relationship with the Earth."

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Beneficial insects that prey on pests can be a gardener's best friend, but many of the predatory insects sold in stores and online are not the right choice for effective biological control. To clear up misconceptions about beneficial insects and explain the best way to get more in your garden to manage insect pests naturally, my guest this week is Suzanne Wainwright-Evans of Buglady Consulting.

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Tomatoes are one of the most well-traveled vegetables — or fruits — that there is and one of the most popular crops in home gardens, but after they were introduced to Europe, centuries went by when they were grown and admired — but not eaten. To dig into the fascinating history of tomatoes, from their origins to recent developments, my guest this week is William Alexander, the author of "Ten Tomatoes that Changed the World."

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Adam's new book is "The Seed Detective: Uncovering the Secret Histories of Remarkable Vegetables," and it's all about our cultural relationship with garden crops. It's written from Adam's personal perspective, which makes it a fun and engaging read as he brings readers along on his adventures to uncover the history of 14 vegetables and how they have become embedded in food cultures. He also shares what saving rare and endangered seed varieties means to the future of our food supply.  

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To mark the release of my new book, "The Vegetable Gardening Book," which hit shelves on Tuesday, for the podcast this week we're going to turn the tables: My friend and frequent podcast guest Meg Cowden of Seed to Fork is going to interview me. 

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Much of the United States is experiencing drought as of this writing and millions of Americans are facing water shortages right now or in the near future. I thought this week would be the perfect time to revisit my conversation with Charles Fishman, author of "The Big Thirst: The Secret Life and Turbulent Future of Water." 

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There are myriad upsides to growing cool-season vegetables in fall, but too many gardeners miss out on this opportunity. The fact is, the vegetable gardening season is far from over when summer ends. To give you the knowledge and confidence you need to grow a fall vegetable garden successfully, this week I'm sharing an updated encore presentation of my comprehensive primer on how to do just that.

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For earlier pops of color, a buffet for pollinators, and overall hardier plants, gardeners should be growing cool-season annuals — flowers that are started in fall or very early spring and bloom weeks or months earlier than heat-loving plants. To offer a primer on successfully planting and growing these flowers, my guest this week is flower farmer, teacher and author Lisa Mason Ziegler. 

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When touting the benefits of gardening, the first things to come to mind are often beautifying spaces and providing fresh produce to eat, but gardeners also enjoy physical, emotional and mental health benefits. To talk about self-sustaining regenerative gardens and the power of gardens to heal, my guest this week is Stephanie Rose, a Master Gardener and prolific writer on gardening and DIY.

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Extreme temperatures, drought and flooding are all becoming more frequent and severe due to climate change, creating new challenges for gardeners. To explain how to gird a garden for the effects of a warming planet, joining me on the podcast this week is Kim Stoddart, who literally wrote the book — two books, in fact — on climate change-resilient gardening.

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Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

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There is so much that we can learn about plant science to improve our understanding of how plants work, so gardener, writer and biochemist Robert Pavlis is back on the podcast this week for part two of our conversation on plant science for gardeners.

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A lack of space is one of the top reasons people give for not having a garden, but with a little knowledge and ingenuity, it's possible to grow flowers, herbs and even vegetables in urban environments. Mark Ridsdill Smith has become a trusted authority on container gardening in small spaces, and he's my guest this week, here to share his advice for getting started.

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I'm always encouraging gardeners to learn the "why do" behind the "how to," because I believe gaining that understanding makes us better at what we do, and to help me do that this week, I'm welcoming back to the podcast Robert Pavlis, a garden myth buster who can break down the plant science behind good gardening.

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The hardest part of growing a gorgeous flower garden that provides interest in all seasons is getting started. Until you've done it, you don't know where to begin. Lucky for us, my guest this week, gardener, writer and educator Jenny Rose Carey, has a new book, The Ultimate Guide to Flower Growing, that walks readers through the steps to successfully combine various flower shapes, colors and textures to craft enviable gardens.

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It's hard to pull ourselves away from our gardens at the height of the growing season, but summer is also prime time for vacation and we all need to take breaks periodically to unwind and reset. Here are steps you can take to prepare your garden so you can enjoy your vacation without ever having to worry about what's happening to your plants while you're away. 

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The time that we take out of our busy days to spend in the garden is precious, and we should always strive to make it as productive and enjoyable as possible, especially during the very trying times of summer. This week, I'm sharing my tips for having a successful summer in the garden while reducing stress on your plants, and yourself!

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Tomatoes enjoy warm weather, but they don't like it too hot. Extended periods of heat can stress out plants and lead to a number of problems. Joining me on the podcast this week to discuss how to overcome the tomato-growing challenges that arise in high heat is tomato expert Craig LeHoullier. 

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An old tree is a marvel to gaze upon but it's the unseen things an ancient tree does in a forest that are truly astounding. To talk about the vital importance of "mother trees" in regenerative forest ecosystems, my guest this week is ecologist Suzanne Simard, Ph.D.

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Regenerative agriculture is one of the best tools we have at hand for combating climate change and increasing biodiversity, but convincing lawmakers, farmers and the public at large of its merits is a challenge. To discuss those merits and how regeneration works, my guest this week is Finian Makepeace of Kiss the Ground, an advocacy organization that promotes soil health as an integral part of the global effort to sequester more carbon.

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If you have been gardening for any amount of time, you've experienced how being with plants can bring great joy. My guest this week, self-professed plant killer turned plant lady Maria Failla, has penned a book that explores how and why plants lift our spirits, and she's here to share the wellness benefits of raising houseplants and gardening.

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Of the many reasons to garden, the presence of beautiful and interesting birds is among the most delightful. To explain how to make your garden bird-friendly, joining me on the podcast this week is Jen McGuinness, aka Frau Zinnie, the author of "Bird-Friendly Gardening: Guidance and Projects for Supporting Birds in Your Landscape."

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Native plants are all the rage right now — or all the buzz, considering how much pollinators love native flowers. But finding a nursery that sells the right native plants for your area can be a challenge. To explain why native plants are vital to wildlife and how we can find native plant collections that are the correct fit for our ecoregions, Mary Phillips of the National Wildlife Federation joins me on the podcast this week.

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When it comes to bees, everyone's familiar with the iconic honeybee, but what many don't realize is that honeybees are not native to North America. The 4,000 or so native bee species in the United States behave much differently than honeybee colonies and are generally not well understood. To educate us on the diversity of native bees, pollinator conservationist and author Heather Holm joins me on the podcast this week.

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Hydroponic gardening is a soil-free horticulture method for raising crops both indoors and out, and it's a lot simpler than it appears to be. To share what you need to know to get started in hydroponics, my guest this week is Master Gardener and experienced hydroponic gardener Roger Sadowski.

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PittMoss has emerged as an alternative to peat moss as a growing medium and potting mix  — and that's great news for gardeners who wish to break their peat habit in favor of a sustainable product. Here to explain what PittMoss is, how it's made, and the advantages of using recycled materials is Dr. Charles Bethke, a horticultural soil and nutrition consultant.

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The insect apocalypse is negatively affecting the world in ways that we are only beginning to understand, and if we continue on our current path, insect decline and the loss of biodiversity across all types of animals and plants will not only continue but also accelerate. To help us understand the scope of the problem and explain ways we as gardeners can help reverse this trend, Professor Dave Goulson joins me on the podcast this week.

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When the history of American gardening is told, the contributions of Black Americans are often overlooked. My guest this week, horticulturist and writer Abra Lee, is working to rectify that, and she joins me to highlight a few of the little-known stories that deserve to be shared.

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Coconut coir is growing in popularity as a seed starting and growing medium, especially, as a replacement for peat moss. But using coir for this purpose has its challenges. To shed light on the history of coir in horticulture and how its naturally high salt content can be overcome for seed starting and seedling growth, my guest this week is international agricultural consultant Dr. Hugh Allen Poole.

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Carnivorous plants pique the interest of every gardener and houseplant hoarder at some point, but bringing a Venus flytrap home on a whim with no idea how to care for it will soon lead to disappointment. Fortunately, to explain how to keep carnivorous plants alive and thriving, my guest this week is International Carnivorous Plant Society Education Director Kenny Coogan, who runs a successful carnivorous plant nursery.

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Gardening hurdles are those challenges that stop us from gardening as much as we'd like to — or that stop us from getting started in the first place. On this week's podcast, I share advice on overcoming common gardening hurdles that listeners have shared.

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Plant breeding isn't just for commercial growers. With some knowledge, a bit of effort and a fair amount of patience, any home gardener can breed new crosses of flowers or vegetables. To discuss how to create hybrid and open-pollinated plant varieties, my guest this week is garden writer and plant breeder Joseph Tychonievich.

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About 80% of the population is allergic to the oily resin urushiol, the compound found in poison ivy that causes dermatitis — a burning, itching rash. Reactions to poison ivy range from mild to life-threatening, and I am among those who have ended up in the ER due to poison ivy exposure. As this three-leaved menace is in its peak season, I am revisiting my conversation with Dr. Susan Pell, a botanist with a deep expertise on the family of plants that poison ivy belongs to.

Podcast Links for Show notes

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Gardeners know the importance of attracting more pollinators to their yards, but there are other beneficial insects that don't get the attention and the credit they deserve, namely predatory and parasitoid insects. To discuss the value of these vital insects and how to attract them to your garden, my guest this week is horticulturist and author Jessica Walliser.

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Chile peppers are all hot to some degree, but how hot a pepper tastes depends on a variety of factors, from growing conditions to the palate of the person eating those peppers. To explain the science behind hot peppers, along with good to know and how to grow information is my guest this week is chile breeding and genetics expert Dr. Paul Bosland to share.

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Download my free guide- Tomato Care Checklist. The key steps every gardener should take to minimize common tomato issues

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Dahlias are tuberous tender perennials that are not only some of the most beautiful flowers on the planet, they're also a blast to grow once you get the hang of it. My guest this week, Kristine Albrecht, is a dahlia expert who is here to share dahlia basics as well as the advanced techniques for breeding new dahlia varieties at home.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

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Collectively, the decisions we make as gardeners impact the ecosystem and the climate for better or for worse. To encourage us all to make positive choices for the planet and biodiversity, my guest this week is garden designer and writer Benjamin Vogt, the author of "A New Garden Ethic: Cultivating Defiant Compassion for an Uncertain Future."

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

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Figs are the perfect plants for beginner fruit growers, and even the most experienced among us love growing figs for their sweet flavor and jammy flesh. Growing figs nearly anywhere is possible, but in cold climates, it poses some challenges, but none of that challenges are insurmountable. To explain what you need to know to grow figs successfully, my guest this week is Upstate New York gardener and horticulturist Lee Reich.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

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In their own way, trees can see, smell, taste, feel and hear. In the wild, most trees live in communities and even have families. To reveal the hidden life of trees, my guest this week is forester and New York Times bestselling author Peter Wohlleben.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

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Because of a few aggressive species, wasps often get a bad rap, but they are vital to the ecosystem and helpful to gardeners for many reasons. Wasps — of which there are 18,000 species in North America — also have fascinating biology and behaviors, and you'll love learning about them. To tell us all about the diversity and importance of wasps, my guest this week is biologist, pollinator conservationist and award-winning author Heather Holm.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

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As gardeners, if we get stuck in our ways, we can't grow. I love the fact that there is always more to learn when it comes to gardening and that we can push ourselves to be better stewards of our land. To discuss many of the lessons she learned this past year, my friend and guest this week is Margaret Roach, gardening columnist for The New York Times and the founder of A Way to Garden.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

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Controlling deer is a challenge for many gardeners, whether they have ornamental gardens or are raising vegetables, not to mention rabbits, squirrels, groundhogs, raccoons, moles and voles. To explore the most effective ways to control nuisance wildlife, I spoke with wildlife damage management specialist Marne Titchenell, who shared her advice on which deterrents work and which are just wishful thinking.

Podcast Links for Show notes

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

Check out The joegardener® Online Gardening Academy for our growing library of organic gardening courses.

Follow joegardener® on Instagram, Facebook, Pinterest, and Twitter, and subscribe to The joegardenerTV YouTube channel.

As we seek to not only stop but reverse wildlife loss and the effects of climate change, going organic is not enough. We need to adopt regenerative practices that provide opportunities for nature to heal. To speak to how we can all participate in changing the world, one garden at a time, my guest this week is gardener and author Emily Murphy.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

Check out The joegardener® Online Gardening Academy for our growing library of organic gardening courses.

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Not everyone has a yard where they can start a garden, which is exactly why my guest this week, Acadia Tucker, wrote her book, Tiny Victory Gardens, including lots of tips on growing food without a yard. Acadia is a farmer, writer and climate activist who promotes gardening methods that increase food resiliency, feed pollinators and draw down carbon. 

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

Check out The joegardener® Online Gardening Academy for our growing library of organic gardening courses.

Follow joegardener® on Instagram, Facebook, Pinterest, and Twitter, and subscribe to The joegardenerTV YouTube channel.

Taking care of a property for many years and watching the plants that you put in the ground mature and flourish is one of the most satisfying parts of gardening, but sometimes circumstances require us to leave our beloved gardens behind. My guest this week, garden designer and acclaimed writer Page Dickey, shares her journey and growth from starting over after leaving her garden of 34 years and what a fresh start has taught her.

Download my free eBook 5 Steps to Your Best Garden Ever - the 5 most important steps anyone can do to have a thriving garden or landscape. It's what I still do today, without exception to get incredible results, even in the most challenging conditions.

Subscribe to the joegardener® email list to receive weekly updates about new podcast episodes, seasonal gardening tips, and online gardening course announcements.

Check out The joegardener® Online Gardening Academy for our growing library of organic gardening courses.

Follow joegardener® on Instagram, Facebook, Pinterest, and Twitter, and subscribe to The joegardenerTV YouTube channel.