7 year old alder planted at 100tpa (left) and 1200tpa (right). Near Darrington, WA.

6 year old alder planted at 230tpa (left) and 600tpa (right). Near Forks, WA

13 year old alder planted at 100tpa. Note large branches extending to the ground. Near Sedro Wooley, WA

13 year old alder planted at 230tpa. Note full, large crown. Near Sedro Wooley, WA

100tpa/12 years old. Note brushy, limby tree form. Near Ryderwood, WA

1200tpa/12 years old just thinned to 230tpa. Note straight, clear stem and small limbs. Near Ryderwood, WA

9 year old alder planted at 1200tpa. Note straight stems, small crowns. Near Coombs, BC