In 2011 I found several nice seng plants growing in the edge of a pine thicket.
The area just east of where they were growign had been clear cut and planted in pines.
Some of these were growing right in that edge and had survived the clear cutting.
The pines were in the 15 year old range, and some of the roots I found were 35+.
They seemed to be doing fine. These were white pine.
There were older mature plants and smaller 3 prongs growing in the edge of the pines with pine needles all aroud them.
In this pic you can see a nice 4 proing and a double top 3 proing and some smaller plants too.
TNhuuter