April 16, 2009

Greening with Native Trees and Shrubs at Arnold Arboretum of Harvard University

April 18, 2009

Gardens & Spirituality at Trinity Church, Copley Square

October 22, 2011

Wicked Bugs: The Louse that Conquered Napoleon’s Army and Other Insect Monstrosities at Weld Hill Research Building, Arnold Arboretum

October 25, 2011

Autumn Colors: A Mystery Revealed at Weld Hill Research Building, Arnold Arboretum

November 3, 2011

Sustainable Practices for Managed Landscapes at Arnold Arboretum

November 16, 2011

The Botany of Thanksgiving at Weld Hill Research Building, Arnold Arboretum

November 29, 2011

American Eden: What Our Gardens Tell Us about Who We Are at Trinity Church in the City of Boston

December 7, 2011

Deadly Nightshades: From Potatoes to Poisons at Arnold Arboretum

May 17, 2012

More Ticks in More Places at Arnold Arboretum

May 30, 2012

Chasing Venus: the Race to Measure the Heavens at Weld Hill Research Building, Arnold Arboretum

June 15, 2012

In the Groves: A Summer Solstice Journey at Arnold Arboretum of Harvard University

June 15, 2012

In the Groves: A Summer Solstice Journey at Arnold Arboretum of Harvard University

October 10, 2012

What A Plant Knows at Arnold Arboretum

October 18, 2012

A Rich Spot of Earth: Thomas Jefferson's Revolutionary Garden at Monticello at Arnold Arboretum of Harvard University

October 20, 2012

Propagating Trees and Shrubs from Cuttings and Seeds at Arnold Arboretum of Harvard University

October 21, 2012

Chainsaw Use and Safety at Arnold Arboretum of Harvard University

October 28, 2012

The Art of Photographing Trees at Arnold Arboretum of Harvard University

October 29, 2012

Gardens for a Beautiful America: The Photographs of Frances Benjamin Johnston at Arnold Arboretum of Harvard University

January 26, 2013

Pruning in Winter at Arnold Arboretum

January 26, 2013

Pruning in Winter at Arnold Arboretum

February 2, 2013

Grafting Techniques for Ornamental Trees at Arnold Arboretum

February 23, 2013

Dwarf Conifer and Juniper Collections via Snowshoes at Arnold Arboretum

February 25, 2013

Biodiversity 2013: Crisis and Opportunity at Arnold Arboretum of Harvard University

February 28, 2013

Bioengineering: Earth-focused Design at Arnold Arboretum

March 11, 2013

Plastic: A Toxic Love Story at Arnold Arboretum

March 16, 2013

Pruning Shrubs at Arnold Arboretum

March 18, 2013

Garden as Community: Planting by Guild at Wellesley College

March 21, 2013

Growing Nuts in the Northeast at Arnold Arboretum of Harvard University

April 6, 2013

Growing Plants from Seeds at Arnold Arboretum

April 20, 2013

Ginkgo Fest at Weld Hill Research Building, Arnold Arboretum

April 24, 2013

Plants of New England: A History in Deep Time at Arnold Arboretum of Harvard University

April 29, 2013

Good Fungus, Bad Fungus at Arnold Arboretum of Harvard University

April 30, 2013

Mycorrhizal Symbioses and the Functioning of Terrestrial Ecosystems at Weld Hill Research Building, Arnold Arboretum

May 1, 2013

Global Environmental Threats: Using a Medical Model to Help at Arnold Arboretum of Harvard University

May 7, 2013

Attracting and Supporting Birds at Arnold Arboretum of Harvard University

May 16, 2013

How Do Woodpeckers Avoid Brain Injury? at Arnold Arboretum of Harvard University

May 18, 2013

Nature Photography Workshop at Arnold Arboretum of Harvard University

May 30, 2013

The Physical Fitness of Leaves at Arnold Arboretum of Harvard University

June 5, 2013

Flash Night: Learning to Socialize with Fireflies at Arnold Arboretum of Harvard University

June 21, 2013

In the Groves: A Summer Solstice Journey at Arnold Arboretum of Harvard University

June 21, 2013

In the Groves: A Summer Solstice Journey at Arnold Arboretum of Harvard University