The best time to transplant shrubs in Oregon is during the early spring or fall. In spring, wait until the danger of frost has passed, usually around late March to April, allowing the plants to establish before the heat of summer. In fall, aim to transplant about six weeks before the first expected frost, typically from late September to early October. These times minimize stress on the plants and promote successful root establishment.
Summer
the best place to by new shrubs is at the home and garden center in your local walmart i buy mine there all of the time and they are the best shrubs i have ever owned
The best time to visit Oregon is in the late summer (August).
Soon after puberty.
The best time is after the first frost and before the last frost of your region. This is because you want to transplant when the plant is dormant.
The best time to plant most trees is during dormancy, so late Fall to early Spring is the best time to plant or transplant hybrid poplars. I feel, if you transplant around December, your trees have plenty of time to get used to their new location before new root, leaf and stem growth begin.
The best time to transplant a peach tree is January. The trees are still dormant from the winter, which will reduce the shock of transplantation. It is also best to transplant a peach tree when it is at least one year old and preferably not after they reach three years old.
Rainy season is the best time to transplant seed. During rainy season, there is a lot of humidity, hence the seed sprouts will get required good quality of water for a better growth.
Early Spring where I live. Early Spring where I live.
Spring
Cedar shrubs grow best in acidic type soils. Because of this one might find it difficult to grow other plants around cedar shrubs. It is also important to note that smaller newer cedar shrubs will take less time to establish then larger ones.
This is a very comprehensive answer from NC State University: http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/shrubs/text/pruning.html