Do Plant Hardiness Zones Matter with Dan McKenney and John Pedlar

Do Plant Hardiness Zones Matter with Dan McKenney and John Pedlar

Author: Susan Poizner, OrchardPeople.com April 26, 2022 Duration: 45:48

In the past, you would consult a plant hardiness zone map if you wanted to know whether a fruit tree or any other plant could survive in your climate.  But our climate is quickly changing. Are plant hardiness zone maps still helpful?

In this episode, we chat about plant hardiness zones with two research scientists from the Canadian Forest Service. They are Dan McKenney, PhD and John Pedlar. You can learn more about their work and download plant hardiness maps here.

This month's recommended resource:
Arbor Day Foundations's new book Now is the Time For Trees: Make an Impact by Planting the Word's Most Valuable Resource (affiliate link)

You can find more information about plant hardiness zones below:

Canadian Plant Hardiness Zone Maps and More:
planthardiness.gc.ca

Change and Evolution in the Plant Hardiness Zones of Canada:
https://academic.oup.com/bioscience/article/64/4/341/247944

The generation of USDA-equivalent extreme minimum temperature models and a comparison with Canada’s plant hardiness zones:

https://cdnsciencepub.com/doi/10.4141/P05-070

 

Beyond Traditional Hardiness Zones: Using Climate Envelopes to Map Plant Range Limits:

https://academic.oup.com/bioscience/article/57/11/929/234249

The host of the Orchard People radio show and podcast is Susan Poizner of the fruit tree care education website www.orchardpeople.com.  


Susan is the author of four books on fruit tree care. Learn more here: https://learn.orchardpeople.com/books


She is also the creator of five-star rated premium online fruit tree care education at: https://learn.orchardpeople.com


HOW TO TUNE IN TO OUR PODCAST

The show airs on the last Tuesday of every month on RealityRadio101 at 1:00 PM ET! While it’s no longer live, you can still watch or listen anytime—and catch the recorded podcast anytime afterward.


📺 Video Podcast: Watch the recorded episode anytime on our YouTube Podcast Playlist.

🎧 Audio Podcast: Download the podcast and listen on your favorite app after it airs.

🌐 Article: Read the article linked to the show "How Does Climate Change Affect Fruit Trees?" and find the video and podcast links there too!

 

✍️ Do you want to learn to grow organic fruit trees successfully? Sign up for OrchardPeople.com's free monthly newsletter at https://orchardpeople.com/sign-up/


For premium fruit tree care education visit: https://learn.orchardpeople.com/


FOR MORE INFORMATION ON GROWING FRUIT TREES THAT THRIVE:


✂️ How to Prune Fruit Trees:

https://orchardpeople.com/how-to-prune-and-train-fruit-trees/

🪲 Fruit Tree Pests and Diseases:

https://orchardpeople.com/protecting-fruit-trees-from-pests-and-diseases/

🌳 How to Feed Fruit Trees:

https://orchardpeople.com/how-to-feed-fruit-trees/

🍎 The Best Fruit Trees to Grow:

https://orchardpeople.com/best-fruit-trees-to-grow/

🌱 How to Graft Fruit Trees:

https://orchardpeople.com/how-to-graft-fruit-trees/


These show notes may contain affiliate links to products. We may receive a small commission for purchases made through these links at no cost to you. Thanks for your support!


  • (00:00) - Introduction to Plant Hardiness Zones
  • (00:38) - Questioning the Plant Hardiness Zone System
  • (00:55) - Meet the Experts: Dan McKenney and John Pedlar
  • (01:16) - Understanding Plant Hardiness Zones
  • (04:49) - The Canadian vs. American Systems
  • (08:39) - Impact of Mulching and Snow on Plant Hardiness
  • (11:02) - Listener Questions and Expert Insights
  • (12:11) - Epigenetics and Plant Adaptation
  • (22:12) - Updating the Plant Hardiness Zone Maps
  • (26:27) - Climate Change and Plant Hardiness
  • (32:27) - Adapting to Climate Change: Challenges and Variations
  • (33:09) - Late Spring Frosts and Plant Sensitivity
  • (33:47) - Listener Insights: Climate Change in Northern Indiana
  • (36:27) - Strategies for Home Growers
  • (38:15) - Sugar Bush Experiences and Climate Variability
  • (41:04) - Advice for Gardeners Adapting to Climate Change
  • (43:37) - Closing Remarks

Imagine stepping into your own backyard and picking a perfect, sun-warmed apple from a tree you nurtured yourself. That tangible connection to the land and the deep satisfaction of growing your own food is at the heart of Orchard People. Hosted by fruit tree care educator Susan Poizner, this podcast digs into the practical and often surprising world of cultivating fruit trees, whether you have a few pots on a balcony or several acres to explore. Each episode feels like a thoughtful conversation with a knowledgeable friend, as Susan and her guests unpack the nuances of pruning for better harvests, managing pests without harsh chemicals, and understanding the life beneath our feet through soil health. You’ll hear from specialists on topics like grafting heirloom varieties, designing resilient food forests, and integrating permaculture principles into any space. It’s more than just tips and tricks; it’s about building confidence and community around sustainable growing. Tune in to this garden-focused podcast for grounded advice that helps both new and experienced growers foster healthier trees and more abundant yields, season after season.
Author: Language: en-us Episodes: 100

Orchard People
Podcast Episodes
Mites and Fruit Trees with Fred Beaulieu [not-audio_url] [/not-audio_url]

Duration: 1:04:41
Fred Beaulieu, Ph.D., a mite expert and Research Scientist from Agriculture and Agri-Food Canada talks about mites - the good, the bad and the ones you'll find in your fruit trees. This month's recommended resource is Th…
Dying Apple Trees and Sudden Apple Decline (SAD) with Kari Peter [not-audio_url] [/not-audio_url]

Duration: 46:53
Kari Peter, Ph.D of Penn State Fruit Research and Extension Centre, talks about Sudden Apple Decline (SAD) or Rapid Apple Decline, which has devastated orchards in Ontario, New York State, Washington and Pennsylvania. Ap…
Growing Uncommon Fruits with Lee Reich [not-audio_url] [/not-audio_url]

Duration: 49:25
Lee Reich, PhD. author of Uncommon Fruits for Every Garden, shares some of the interesting fruits he grows on what he calls his "farmden" (which he says is more than a garden, and less than a farm) in New York state. The…
Growing Tropical Fruits Anywhere with Byron Martin [not-audio_url] [/not-audio_url]

Duration: 45:51
Byron Martin, co-author of the book Growing Tasty Tropical Plants In Any Home, Anywhere talks about tropical fruits you can grow indoors where ever you live. Byron is the third generation owner of Logee’s Plants for Home…
Buying Organic Fruit Trees with Taylor Ingram [not-audio_url] [/not-audio_url]

Duration: 51:28
You may grow your fruit trees organically - but are you growing organic fruit trees? In this episode, we speak with Taylor Ingram of Stark Bro's Nurseries and Orchards about their new line of organically grown fruit tree…
Autumn Olives - If You Can't Beat Them, Eat Them! with Dustin Kelly [not-audio_url] [/not-audio_url]

Duration: 35:14
Autumn olive shrubs (Elaeagnus umbellata) are considered an invasive species in North America. One way to cut down on their spread is to harvest the fruit and reduce the seed. Dustin Kelly of Autumn Berry Inspired talks…
Dehydrating Fruit with Teresa Marrone [not-audio_url] [/not-audio_url]

Duration: 51:38
Teresa Marrone, author of The Beginner's Guide to Dehydrating Food, talks to us about making and using dried foods. We learn what types of home-grown or bought fruit are easiest to dehydrate, what types of tools you need…
Easy Berries with Bob Bors [not-audio_url] [/not-audio_url]

Duration: 52:17
Bob Bors, co-author of the book "Growing Fruit in Northern Gardens" and the head of the Fruit Breeding Program of the University of Saskatchewan talks about his favourite easy-to-grow berries that thrive in cold climates…
Hazelnuts and Truffles with Adam Koizol [not-audio_url] [/not-audio_url]

Duration: 49:16
Adam Koziol of Earthgen Tree Nursery in Ontario explains why hazelnut trees are becoming increasingly popular both in the home garden and as a cash crop. He also discusses how the trees can be inoculated so that they pro…
Willow Mulch for Fruit Trees with Dr. Glynn Percival [not-audio_url] [/not-audio_url]

Duration: 49:31
Dr Glynn Percival manages the UK and Ireland Bartlett Tree Research and Diagnostic Laboratory based at the University of Reading and talks about how new growth on willow trees that makes a mulch that boosts fruit tree he…