The Evergreen Thumb

Every gardener has decisions they would make again…and a few they probably wouldn't.

In this episode, Erin Hoover reflects on the gardening choices that paid off, the ones that created more work than expected, and the unexpected surprises that have shaped her garden over the years. From self-seeding herbs that got out of control to volunteer flowers worth keeping, she shares practical lessons learned through trial, error, and observation.

Along the way, Erin discusses why investing in quality seed potatoes and garlic has been worthwhile, how redesigning her vegetable garden improved watering efficiency, and wh...

Gardening changes as we do. Tasks that once felt easy may take more planning, different tools, or a new approach. In this episode of The Evergreen Thumb, we talk about practical ways gardeners can adapt their spaces and routines to keep gardening comfortably and confidently over time.

King County Extension Master Gardener Sally Bagshaw shares ideas for reducing physical strain, improving accessibility, and rethinking garden design to better fit changing needs. We discuss raised beds, pathways, ergonomic tools, lower-maintenance planting choices, and strategies that help gardeners stay connected to the activities we enjoy most.

In this episode, Lisa Taylor returns to share tips on saving water while gardening. Lisa focuses on how being intentional with water use improves soil health, efficient watering techniques, and drought-tolerant practices for thriving plants. She shares some of her favorite high-quality tools to make saving water easier. Listen to learn how to build resilient gardens that thrive with less water, perfect for hot summers and adapting to climate change.

In this episode of The Evergreen Thumb, we talk with Master Gardener Ed Adams about growing dahlias in Western Washington, including what it takes to manage a large collection of over 600 plants.

Ed shares why dahlias thrive in Sequim's unique climate and walks through practical, research-based approaches to growing them successfully. The conversation covers getting started with tubers, seasonal care, supporting healthy growth, and managing common garden challenges using an integrated pest management approach.

We also explore what changes when dahlias are grown at scale, along with tips for digging, dividing, and storing tubers for...

In this episode of The Evergreen Thumb, we talk with Dr. Joel Gardner from the WSU M.T. James Entomological Collection about native bees, including Dialictus sweat bees, and how new species are discovered. Joel explains how insect collections support research on pollinators and biodiversity in Washington, and why preserved specimens remain important for understanding ecological change over time.

Resources mentioned in this episode, along with a full transcript, can be found on our website. (link opens in new window)

Explore the development of a sensory garden designed to be accessible and therapeutic for neurodivergent individuals, veterans with PTSD, and others with sensory sensitivities. Learn about the design, purpose, and community impact of this innovative project. 

Resources mentioned in this episode, along with a full transcript, can be found on our website.

Slugs and snails are a constant frustration for gardeners in Western Washington, but trying to eliminate them completely isn't the goal, and it's not realistic.

In this episode, we're joined by Skagit County Master Gardener Diana Wisen to talk about why these pests thrive in our region, what role they play in the ecosystem, and how to manage them effectively in a home garden. We dig into slug behavior, life cycles, and the key moments when they're most vulnerable.

You'll come away with practical, research-based strategies that focus on control rather than eradication, helping you...

In this episode, Patrick Schults, WSU Extension forester, discusses the threat of emerald ash borer, an invasive insect that poses a significant risk to Washington's forests and urban trees. Learn about how it spreads, signs of infestation, and what communities can do to prepare and respond. 

Resources mentioned in this episode, along with a full transcript, can be found on our website.

In this solo episode, Erin shares her top 10 gardening tips for 2026. These are practical shifts that can make your garden easier to manage while helping plants handle stress such as inconsistent water, pests, and changing weather patterns.

You'll hear a mix of mindset shifts, common habits to stop, and a few practices worth adding to your routine. Topics include soil health, watering strategies, biodiversity in the garden, integrated pest management, and making site-driven plant choices.

Rather than overhauling everything, the goal is simple: choose one meaningful change this season and observe the results.

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In this conversation, Colleen Adams-Schuppe, the executive director of the Yakima Area Arboretum, shares her journey and the history of the arboretum, highlighting its unique origin story as a community-driven initiative. She discusses the challenges and successes of curating a living landscape in a desert climate, the significance of various garden spaces, and the role of educational programs in fostering community engagement. Colleen emphasizes the importance of volunteers and community partners in maintaining the arboretum and outlines future aspirations for its growth and development. 

Resources mentioned in this episode, along with a full transcript, can be found on o...

Most gardeners recognize honey bees, but in Washington, there are over 600 species of native bees doing much of the pollination work in our landscapes.

In this conversation, Anne Bulger, a WSU Master Gardener, discusses the significance of native bees in gardening and pollination. She shares her journey into the world of native bees, emphasizing their efficiency as pollinators compared to honey bees. The discussion covers common misconceptions about native bees, the importance of supporting them in gardens, and the diversity of bee species, particularly mining bees. Anne also highlights the role of native bees in maintaining healthy...

Good vegetable gardens aren't built by following rules; they're built by paying attention. In this episode, we step back from prescriptive advice and focus on how experienced gardeners actually make decisions.

Instead of chasing planting dates or perfect systems, we talk through how to read your landscape, choose crops that make sense for your goals and conditions, and time planting based on what plants respond to, not what the calendar says. You'll learn how to think about frost dates, growing degree days, and USDA zones without confusion, and why observation is one of the most valuable tools...

What does it take to steward a public garden in the middle of a growing city? This episode explores how Bellevue Botanical Garden blends design, ecology, and community partnerships to create a resilient urban landscape.

James Gagliardi, the director of Bellevue Botanical Garden, shares insights into the garden's history, community involvement, and its role as a vital green space in an urban environment. He discusses the importance of accessibility, educational opportunities for home gardeners, and the collaborative efforts in maintaining and curating the garden. The conversation also highlights future growth plans and how visitors can engage with...

Are you looking to boost your vegetable garden's productivity while keeping soil healthy and pests under control? In this episode, Erin dives into practical crop rotation strategies, including Eliot Coleman's proven rotation and the leaf–root–flower–fruit method. Learn how to sequence crops, use cover crops, and plan rotations that maximize yields and protect your garden soil.

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We're taking a break from the podcast this week for the holidays.  We'll be back on January 6 with a new episode on vegetable crop rotation.  Happy New Year!

Creating Plant Guilds with Native Plants in Washington State

Discover how to design thriving, low-maintenance landscapes by mimicking nature's own plant communities! In this solo episode, we explore the concept of plant guilds—groups of plants that work together to create mutually beneficial ecosystems—using Washington's incredible diversity of native species.

Learn the essential layers of a successful guild, from canopy trees down to groundcovers, and how each plant plays a specific role in supporting the whole community. We feature detailed deep dives into two guilds:

Western Washington Rainforest Edge Guild - Multi-layered wood...

Washington once grew hundreds of unique apple varieties—many of which disappeared from modern cultivation. In this episode, David Benscoter of the Washington Lost Apple Project shares how he tracks down these forgotten varieties, why so many vanished, and what it takes to preserve their genetics for the future.

We explore how old orchards are located and identified, the stories behind rare rediscoveries, and how these heritage apples contribute to biodiversity and resilience in a changing climate. David also offers insight into how home gardeners can support conservation efforts and even grow heritage fruit trees themselves.

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In this episode of The Evergreen Thumb, host Erin Hoover interviews Deirdre Griffin-LaHue, an expert in soil health, about the importance of soil structure in gardening. They discuss how soil structure—how mineral particles and organic matter form aggregates—affects water retention, air flow, and plant health.

Deirdre explains the difference between soil texture and soil structure. Key tips include protecting soil with mulch or cover crops, adding organic matter to feed beneficial microbes, and avoiding compaction by not working the soil when it's too wet or dry.

Resources mentioned in this episode, along with a fu...

In part nine of our Program Priority Series, guest Laurel Moulton is back to go over clean water. In this episode, Laurel covers:

In this episode of The Evergreen Thumb, guest Todd Murray joins host Erin Hoover to discuss how climate change is affecting garden pests. He explains that "pests" are defined by their interactions with humans and tend to thrive in disturbed environments, often reproducing rapidly. Climate change, especially shifting rainfall patterns and warmer temperatures, is stressing plants, making them more vulnerable to native and non-native pests such as beetles and aphids.

Resources mentioned in this episode, along with a full transcript, can be found on our website.

Healthy soil is the foundation of every thriving garden. 🌱 In this episode of The Evergreen Thumb, Erin explores the key principles of soil health and how gardeners can apply them to create resilient, productive soil at home.

What you'll discover in this episode:

The core principles of soil health and why they matter for your garden

How to keep soil covered, reduce disturbance, and maintain living roots

Ways to encourage diverse soil life for stronger, healthier soil

Resources mentioned in this episode, along with a full transcript, can be found...

Soil is a living and dynamic resource. It provides critical services essential for life, including food production, shelter, and water filtration. It supports plant growth, serves as a habitat for countless organisms and even supplies antibiotics. Humans depend on soil for waste management, water purification, and as a foundation for infrastructure.

In part eight of our Program Priority Series, guest Tessa Halloran goes over soil health. In this episode, Tessa covers:

In this episode of The Evergreen Thumb, guest Karen Wright from the Washington State Department of Agriculture tells us all about the Washington Bee Atlas and the importance of native bees.

Karen explains the difference between honey bees and native bees. She talks about how Washington state has around 600 known native bee species, with many more still undescribed, and goes over how native bees are vital for pollinating about 80% of flowering plants, which is crucial for our ecosystems and agriculture.

She explains what the Washington Bee Atlas is and...

Wildfires are becoming more frequent and more intense—especially in areas where homes and wildlands meet. But your garden can be part of the solution.

In this episode, I talk with Al Murphy, a national wildfire management expert and WSU Master Gardener, about how home gardeners can take simple, effective steps to reduce wildfire risk around their homes. Learn what it means to have a fire-ready garden, what to plant (and avoid), and how to create defensible space without sacrificing beauty or biodiversity.

Whether you live in the wildland-urban interface or just want to be mo...

In this episode of The Evergreen Thumb, we're joined by Jim Kropf, WSU Pierce County Extension Director, to explore how thoughtful plant choices can help protect your home and garden from wildfire. With fire seasons growing longer and hotter across Washington, understanding which plants are more fire-resistant—and how to maintain them—is essential for creating a safer, more resilient landscape.

Jim shares the key characteristics that make plants less prone to ignition and offers tips on landscape design and defensible space. We also discuss how to balance fire resistance with water conservation.

Whether you're upda...

What does a truly waterwise garden look like in Washington, and why does it matter more than ever? In this episode, we're joined by Spokane County Master Gardener Mason Neil to explore how home gardeners can make practical, research-based choices that reduce outdoor water use while creating beautiful, resilient landscapes.

From choosing drought-tolerant plants to using more efficient irrigation, Mason shares tips and insights rooted in local experience and the WSU Master Gardener program's Water Conservation priority.

Whether you're redesigning your yard or just adjusting your watering habits, this episode will leave you inspired to...

💧 Are you overwatering your garden?

You're not alone!

In our newest episode of The Evergreen Thumb, WSU horticulturist Austin Little shares easy, efficient watering strategies to help your garden thrive—without wasting water. 🌿

Learn about:

• How to water less but grow more

• Mulch and soil tips to retain moisture

Resources mentioned in this episode, along with a full transcript, can be found on our website.

Pollinators play a critical role in food production, plant biodiversity, and ecosystem health—but many of these essential species are facing serious threats.

In this episode of The Evergreen Thumb, we sit down with a WSU Master Gardener and Certified Pollinator Steward to explore why pollinators matter, what's putting them at risk, and how you can take simple, effective steps to support them in your own garden. From native plant choices to pollinator-safe practices, this conversation is packed with practical, science-based tips for every Washington gardener.

🌼 Learn how the WSU Master Gardener Program supports pollinator stewar...

In this episode of The Evergreen Thumb, we're joined by Jennifer Marquis, Statewide Program Leader for the WSU Extension Master Gardener Program, to talk about the exciting launch of the Washington State University Extension Green School.

Designed to deepen gardeners' knowledge and environmental stewardship, the Green School offers flexible, research-based education through two tracks: the Washington Gardener Certificate and the WSU Extension Master Gardener Volunteer certification.

Jennifer walks us through the program's mission, how WSU Green School is structured, and the gardening topics included in the training. 

Whether you're looking to garden more su...

Get a first look at what's in store for the 2025 WSU Master Gardener Advanced Education Conference! Host Erin chats with the AEC Committee Chair and the Educational Outreach Program Lead about this year's theme, keynote speakers, exciting workshops, and how gardeners of all backgrounds can get involved. Whether you're a certified Master Gardener or a passionate plant lover, this episode highlights why AEC is a must-attend event for continuing garden education and community connection.

Registration for the WSU Extension Master Gardener Advanced Education Conference 2025 opens on June 1, 2025

For resources, links, a transcript, and more be...

In this episode, we explore the WSU Extension Master Gardener Program's Local Food priority—and how growing food close to home can lead to healthier individuals, stronger communities, and a more resilient environment.

I break down how local food connects to sustainable gardening, food access, and community empowerment. Whether you're growing in a backyard, a balcony, or a community garden, discover practical steps you can take to make a meaningful difference through what you grow.

Listen now to learn:

Why local food matters for health and sustainability

Gardening practices that support lo...

Want to keep your forested property healthy and thriving? In this episode, we chat with Sarah Stewart from WSU Forestry about backyard forest stewardship—covering best practices for managing small woodlands, improving tree health, enhancing wildlife habitat, and building resilience to climate change.   Whether you have a few trees or several acres, this episode is packed with expert insights to help you care for your woodland sustainably.  We also explore the Women Owning Woodlands (WOW) program and how it supports female forest landowners. 

For resources, links, a transcript, and more be sure to visit our website at https...

A healthy garden is more than just beautiful—it's biodiverse! In this episode of The Evergreen Thumb, we explore how increasing plant diversity in home gardens, community spaces, and public landscapes can create more resilient ecosystems, healthier soil, and stronger pollinator populations.

Join us as we discuss:

Why biodiversity is essential for sustainable gardening

How native plants and layered plantings support wildlife and soil health

Practical ways to enhance biodiversity—even in small urban spaces

How plant diversity helps address climate change, pollinator decline, and habitat loss

Whet...

In this episode of The Evergreen Thumb Oregon State University Extension's Wildlife Specialist, Dr. Dana Sanchez, joins host Erin Hoover to discuss strategies for managing wildlife pests (a.k.a. vertebrate pests), in your garden and surrounding areas.  

For resources, links, a transcript, and more be sure to visit our website at https://evergreenthumb.mastergardenerfoundation.org/episode044/

From stress reduction to faster healing times after surgery, being in nearby nature has measurable effects on our well being. Master Gardeners work to foster the connection between people and the natural world to help our communities be able to access nature no matter where they live.

In part two of our Program Priority Series we sit down with Master Gardener Cathi Lamoreux to discuss Nearby Nature.

For resources, links, a transcript, and more be sure to visit our website at https://evergreenthumb.mastergardenerfoundation.org/episode043/

In this episode, we dive into the fascinating world of spiders and their crucial role in garden ecosystems. Learn about common spider species in the Pacific Northwest, including orb-weavers, wolf spiders, and jumping spiders, and how they help gardeners by naturally controlling pest populations.

Expert insights help unravel the mysteries of spider behavior, their impact on pollinators, and ways to create spider-friendly habitats in your garden.

By the end, you'll gain a new appreciation for these eight-legged allies, embracing their role as key players in sustainable gardening and healthy ecosystems.

For resources, links...

Climate change is reshaping how we garden, from shifting planting zones to increased drought and extreme weather. In this episode, we're joined by Mike Peronto to explore how the WSU Extension Master Gardener Program's Climate Change Priority is helping gardeners adapt. Learn practical, science-backed strategies for building climate resilience, improving soil health, conserving water, and selecting plants that thrive in changing conditions.

For resources, links, a transcript, and more be sure to visit our website at https://evergreenthumb.mastergardenerfoundation.org/episode041/

In this episode of The Evergreen Thumb, host Erin Hoover speaks with author and gardening educator Lisa Taylor about the joys and benefits of growing perennial edibles in the Pacific Northwest. They explore a variety of crops, from perennial vegetables like asparagus and rhubarb to fruit-bearing trees and shrubs well-suited to the region's climate. Lisa goes over lesser-known edible perennials, herbs, and her favorite edible perennials in her garden. She not only lists what edible perennials work well in the Pacific Northwest, but she also shares practical tips for incorporating these resilient and sustainable plants into home gardens and...

In this episode, we dive into the fascinating world of vermicomposting with WSU Extension Master Gardener and Master Composter Recycler Program Coordinator, Jason Adams.

Learn how worms transform kitchen scraps into rich, nutrient-dense compost that boosts soil health and supports sustainable gardening. We discuss the basics of starting and maintaining a worm bin, troubleshooting common issues, and the numerous benefits vermicompost offers to gardens, the environment, and even local food systems. Perfect for gardeners and sustainability enthusiasts looking to reduce waste and enrich their gardens naturally!

For resources, links, a transcript, and more be sure...

Discover how gardening nurtures more than just plants—it's a powerful tool for supporting mental wellness as we age. Join Erin as she explores the psychological and emotional benefits of gardening for aging adults with Katie Luna, a WSU doctoral candidate in clinical psychology.

For resources, links, a transcript, and more be sure to visit our website.