August 17, 2019. Snohomish County Dahlia Society encourages all who are interested in growing dahlias, whether for the home garden, or for showing dahlias for competition at local shows and fairs. The club meets in Everett. Snohomish County Dahlia Society holds tuber and cut flower sales in spring and flower show in summer. More info: http://www.nwdahlia.org/clubs/.