Small Tree help - Japanese Maple?
I have some Emerald Green Arborvitae along my fence line and would like to plant some trees next to them as a second barrier (view and sound). My questions are:
1) I am looking for a tree that gets 10" wide by 15" tall. Any suggestions for zone 6? I have limited space (9ft x 9 ft). I worry the tree may crowd the Arborvitae. Are my options limited?
2) How big does the root structure get for trees (i.e. Japanese Maple)? Also, there is a sewer drain. How far away do I need to plant the tree from the drain?
3) How far should I plant the tree from the Arborvitae?
Thanks in advance for any help. Bel