The arboretum was created by the Bells Garden Club in 2001 and included about 30 varieties of trees indigenous to the area.
The Bells club used several matching grants to add trees, a number of trees were donated as memorials, and the arboretum received its Level II certification in 2006.
Arboreta are designated as Levels I through IV based on the number of different tree species they contain.
A Level III arboretum must have a minimum of 90 different species, each correctly labelled with both common and scientific names.
The Louise Pearson Arboretum now lists more than 100 different tree species and attained a Level III designation in November, 2011.