Sometime this spring I'd like to repot the gingko and larch, and check the
roots on the maple.
Mark Hill - Harrisburg PA

Have you asked Jim Doyle?
My understanding on group plantings is that if they are healthy, you don't yank
them out, but you replace wedges of soil between the trees, one wedge a year. I
am planning to start this with my 10 year old Chinese pistachio group this
spring. Some of these trees are rooted right on to their rock, so I don't think
I should mess with them.

Iris,
Central NY, Zone 5a, Sunset Zone 40
"A tree never hits an automobile except in self defense." - Woody Allen