Blue spruce can be propagated from cuttings or seeds.
From cuttings
Take cuttings: In late summer or early fall, take healthy stem cuttings that are about the length of your palm.
Prepare the cuttings: Remove the needles from the lower two-thirds of the cutting.
Apply rooting hormone: Dip the cut end of the stem in rooting hormone.
Plant the cuttings: Plant the cuttings in a sandy loam mixture.
Maintain moisture: Keep the soil moist, but not too wet.
Wait for roots: Roots can take more than eight weeks to grow.
From seeds
Gather cones: Collect new cones in early to mid-September.
Dry the cones: Put the cones in a paper bag and let them dry for one to two months.
Shake the bag: When the bag is shaken, the seeds should fall out of the cones.
Prepare the growing medium: Loosen and dampen the potting mix.
Plant the seeds: Plant the seeds in the potting mix.
Wait for germination: Germination usually occurs within two to four weeks.