Jensen-Olson Arboretum Collections
Plant Collections
Primula, commonly called primroses, were Caroline Jensen’s favorite flower and her plantings of this species formed a unique and captivating foundation for the arboretum. The Nationally Recognized CollectionTM for the Genus Primula was awarded in 2012 by the Plant Collections Network. Juneau’s historical climate made a perfect setting for many Asiatic and European species that thrive in moist meadows and forests. Staff built upon Caroline’s plantings to create the unique display and today over 170 varieties of Primula can be seen in any one year, depending on weather. The grand display of blossoms begins in early May. Different species and varieties can be seen blooming throughout the summer, a few even into fall.
For details on some varieties and photos, see the Friends of Jensen-Olson Arboretum produced Field Guide.
An arboretum serves as a botanical garden and living museum with much of its collection consisting of perennial, woody plant material. Since the founding of the Jensen-Olson Arboretum in 2007, we have made a concerted effort to expand the number and diversity of trees for visitors to observe and study. One particular highlight of this increase is the expansion of trees which provide notable autumn foliage displays. Additionally, curatorial practices for this collection have shifted to non-bear-attracting species which simultaneously grow well in Southeast Alaska.
Jensen-Olson Arboretum is a certified Level II Arboretum accredited by ArbNet through the Morton Arboretum. In addition to being surrounded by the magnificent Tongass National Forest, over 125 species of trees and woody plants can be seen on the grounds. Native trees and horticultural specimens thrive together surviving some wild coastal rainforest weather. There are several rhododendron specimens planted by Caroline that are near fifty years old. Southeast Alaska’s native shore pine can be seen along with Japanese white pines and Mugo pines. The most impressive tree onsite is the 110+ year old tree known as the Grand Old Apple Tree. Though it has been tested, it is an unknown variety.
For more information on the plants at JOA, see the Friends of Jensen-Olson Arboretum produced Field Guide.
