Lecture Series
Hear talks by nationally recognized experts as part of the Director’s Lecture Series.
What's New 
Arboretum Heralds New USDA Hardiness Zone Map
January 26, 2012 Arnold Arboretum
The release of an updated Plant Hardiness Zone Map by the USDA provides useful guidelines to predict a region’s average annual minimum temperature, a vital statistic in determining whether a plant will survive in a given area. more »
Warm weather encourages winter annuals
January 10, 2012 Arnold Arboretum
The unusually warm weather we’ve experienced in southern New England this fall and winter encourages the growth of a group of weedy herbs known as winter annuals. more »
Arboretum launches new online GIS collections tool
December 1, 2011 Arnold Arboretum
To improve access to its living plant collections, the Arboretum has launched Collection Researcher, a dynamic GIS web application. The tool facilitates desktop exploration of Arboretum collections, with links to global information resources. more »
Last modified: January 28, 2012 | © 2012 The President and Fellows of Harvard College | privacy statement | Get Directions from Google | Intranet