It's from an area that is about 35 year old second growth. It's growing with salal , cascara, alder, willow and fir. It's on a slope, kind of dampish. The surrounding trees are about 40-50' tall. The shade makes the OS grow taller I think. In the area I collect I think the OS is on its last legs. It will be shaded out in the next 20 years or so. I just counted the rings on a 2" diameter offcut and it was around 20 years old, give or take a couple. Where are you?