Site prep is essential. Vegetation and grasses should be controlled to allow your newly planted trees to thrive. After planting, competing vegetation should be controlled the first few years. The use of herbicides is usually the cheapest and most effective way to get your trees off to a healthy start, mulch is usually not recommended. Manual removal of weeds is acceptable but is time consuming. Dig the hole before you remove the container and thoroughly water the potted plant before you remove it from its container. Turn the container onto its side and give the bottom a sharp tap. The root ball should fall out in one piece. Before you put the root ball in the prepared hole, cut any long roots that completely encircle the root ball and gently pull other roots away from the ball and spread them out. This will allow you to place backfill soil directly around those roots. Plant tree, backfill with soil, tamp firm with hands and water. Water regularly and add more soil if settling occurs.