I planted 5 apple trees on my property (Portland, OR) three years ago.
Since then I've planted a lawn that has grown around the trees. Will this
grass hinder the development of these trees and should I dig it up around
them?

Also, these trees were about 6' tall when I purchased them three years ago,
all on semi-dwarf M6 rootstock. Anyone know how many years till I can
expect them to start to fruiting?

Thanks for any comments,
Jeff