I was a
non-believer for a long time, but planting trees in the fall can work
very well. Yet, I would caution you about planting evergreen trees in
the fall. It's a lot more risky that they will get through the winter as
compared to a deciduous tree, primarily due to our cold, dry winters.
Watering the
trees thoroughly is very important with fall planting. Giving them a
good, deep watering before the really hard frost freezes the soil will
help insure that they will survive our Wyoming conditions. Better yet,
water the transpIanted tree again in late winter when temperatures get
above freezing during the day. I encourage you to mulch the tree with
tree bark or similar material as well.
Although spring
is still the most opportune time to plant trees in my book, fall
planting of deciduous trees can be done successfully if done correctly.