Measure the height of the baby blue spruce's root ball using a tape measure or a measuring stick.
Use a shovel to dig the soil to a depth that is one to two inches shorter than the height of the tree's root ball.
Create a saucer-shaped hole, which will encourage fast root regeneration by directing the roots upward toward richer oxygen levels.
Measure the width of the tree's root ball using a tape measure or measuring stick. Make the planting hole twice as wide as the root ball. If the root ball is 15 inches in diameter, for example, create a 30-inch-wide hole.
Set the tree into the hole, making sure to place the root ball on undisturbed soil.