Also known as Colorado Blue Spruce · Colorado Spruce · Hickory Pine
Blue spruce (Picea pungens) is a striking evergreen conifer known for its stiff, silvery-blue to green needles and pyramidal shape, ideal for ornamental landscapes.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers full sun for best needle color and compact growth. Can tolerate some partial shade, but may result in less vibrant blue hues and a more open habit.
Moderate
50% intensity
Keep soil consistently moist, especially when young. Allow top layer to dry slightly between waterings once established. Avoid waterlogging.
Well-drained
50% intensity
Cold Hardy
25% intensity
Thrives in temperate climates and is very cold-hardy. Protect young trees from extreme heat and drought.
Outdoor
50% intensity
Low
25% intensity
Generally does not require fertilization unless growth is poor or foliage is pale. Use a balanced, slow-release conifer fertilizer in early spring if needed.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Blue spruce prefers consistent moisture, especially when young. Water deeply once established, allowing the top few centimeters of soil to dry between waterings. Reduce watering in cooler months.
Avoid waterlogged conditions, which can lead to root rot. Monitor soil moisture to prevent stress.
Pruning is typically minimal, mainly for removing dead, damaged, or crossing branches. For shape control, prune lightly in late winter or early spring before new growth begins.
Avoid heavy pruning as it can negatively impact the tree's natural form and health.
Blue spruce is primarily propagated through grafting, as seed germination can be unpredictable, and seedlings may not exhibit the desired blue coloration. Grafting is usually done by experienced horticulturalists onto Picea pungens rootstock in late winter.
Repotting is rarely necessary for established blue spruce trees, as they are typically planted directly into the ground. If grown in containers, repot only when root-bound, usually every 3-5 years.
Repot in early spring before new growth emerges, using well-draining soil.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Blue Spruce (Picea pungens)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| kingdom | Plantae |
| division | Tracheophyta |
| class | Pinopsida |
| order | Pinales |
| family | Pinaceae |
| genus | Picea |
| species | Picea pungens |
Answers based on plant encyclopedia data
