The spruce tree is rather hard to style into Bonsai, mostly because it doesn't backbud easily. The spruce is however widely available and usually not very expensive to buy as nursery stock. Moreover, it is easy to care for.
If you need help identifying your tree, try our Bonsai tree identification guide.
Specific Bonsai care guidelines for the Spruce
Position: The spruce (Picea) is an outdoor tree, which should be placed at a bright spot and outside year round. It prefers much sun in summer. Protect it from freezing temperatures.
Watering: Especially in spring and summer the spruce Bonsai needs regular watering. No particularities.
Feeding: Feed the tree during the entire growth season, from early spring till autumn. Use a balanced feed.
Pruning: Different from other conifers, don't pinch needles early. Wait for the shoots to mature a bit, and than pinch back to about 1/2 the length of the shoots. Healthy trees will backbud towards the trunk, but this is quite difficult to achieve. Prune older branches to create open areas where young buds can grow.
Repotting: Every two years, in early spring (before the first growth) or in autumn.
Propagation: Sow seeds in spring or use hardwood cuttings.
For more detailed information on these techniques, try our Bonsai tree care section.
Example of a Spruce (Picea) Bonsai tree