DLee wrote:
I must admit watering was plenty, but only when it showed sign of dryness.
But can these young Japanese maples stay live outdoors all through the harsh
winter?

Dan

Yes, get them out now but in a sheltered place. ie Good light but no
direct sun, protected from strong winds and not in a frost hollow. Also
they are not the easiest plant in containers. They will be much happier
planted in the ground. Ideally well drained slightly acid soil and other
conditions as above.

Rod