Episode 120: An Interview with Doug Tallamy

The Nature of Oaks, Doug Tallamy’s latest book Photo: courtesy of Doug Tallamy

We very pleased to bring you a special episode of Let’s Argue About Plants today, featuring an interview with Douglas Tallamy, PhD. Several months ago, Christine Alexander, digital content manager for, sat down with the famed professor of entomology and wildlife ecology at the University of Delaware to discuss how plants can save our planet. Tallamy has spent his life’s work researching the impact of nonnative plant species on the environment with his fieldwork playing a critical role in solving the mystery of the plummeting insect and bird populations seen over the past 50 years. Despite the seemingly larger-than-life problems we face, Tallamy insists there are ways average gardeners can help save our ecosystems. Within the interview we get answers to the questions gardeners want to know like, “Should we be planting only native plants?” And “What are keystone species and why should I be filling my landscape with them?” Tallamy’s message is sometimes misconstrued, especially when it comes to a gardener’s role in the climate crisis. We hope this interview sheds some light and hope on actions steps we can all take to help nature. As Tallamy says, “we’re its last hope.”

This interview was edited for length and clarity. For further reading, check out Douglas Tallamy’s most recent books, The Nature of Oaks (2021) and Nature’s Best Hope (2020).

Christine Alexander, digital content editor
Christine Alexander, digital content editor Photo: courtesy of Christine Alexander

Doug Tallamy
Douglas Tallamy, PhD (credit: Rob Cardillo; courtesy of Doug Tallamy)

Keystone Plants:

Photo: Danielle Sherry
  1. Goldenrod (Solidago spp., Zones 3–9)

    White wood aster
    Photo: Danielle Sherry

  2. Aster (Aster spp., Eurybia spp., Symphyotrichum spp.,
    Zones 4–9)

    Photo: Jennifer Benner

  3. Sunflower (Helianthus spp., Zones 3–9)
  4. Oak (Quercus spp., Zones 2–9)
  5. Cherry (Prunus spp., Zones 3–8)

    Photo: Danielle Sherry

  6. Birch (Betula spp., Zones 3–9)

    Photo: Danielle Sherry

  7. Cottonwood (Populus spp., Zones 2–9)
  8. Elm (Ulmus americana, Zones 3 to 9)
  9. Willow (Salix spp., Zones 4-10)


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