What's New

Due to continuous episodes of burglary and vandalism, the Arnold Arboretum has permanently removed all outdoor donation boxes from its landscape. Thieves dismantled the six locked boxes originally located at entrance gates and along Arboretum roadways several times over the past two years, and seemingly escalated their efforts this spring.
Focus on Phenology: Leafing Out
May 6, 2016 ARBlog
To the casual observer, the emergence of leaves can seem almost instantaneous. In reality, the greening of trees and shrubs in Massachusetts occurs during a 4 to 6 week interval, beginning in early spring. Leaf-out marks the true beginning of spring activity, as solar energy captured through photosynthesis becomes available to the food chain.
Beeches, lindens, and walnuts erupting from buds
May 4, 2016 Ned Friedman, Director of the Arnold Arboretum
Continuing the celebration of amazing buds bursting forth this past week at the Arnold Arboretum.