One of the World's Smallest Blue Spruce Globes

Blue Planet Spruce (Picea glauca 'Blue Planet') is a true miniature - an exceptionally slow, dense little globe of fine blue-green needles, often growing barely an inch a year. Reaching only about a foot across in a decade, it is a prized collector's gem for troughs, fairy gardens, and the very front of a rockery.

Blue Planet Spruce Plant Details

Blue Planet Spruce Uses in Minnesota Landscapes

Troughs & Miniature Gardens

Its tiny, tight globe is perfect for troughs, fairy gardens, and miniature conifer collections.

Collector's Gem

A featured specimen for the front of rockeries and special small-space spots.

Best Time to Plant Blue Planet Spruce in Minnesota

Spring through early fall all work, but late August through mid-September is ideal, giving roots time to settle before the ground freezes. Water deeply once a week the first season and mulch to hold moisture.

Blue Planet Spruce Uses in Minnesota Landscapes

Premier rock garden and trough specimen

One of the smallest, slowest spruces in the world, Blue Planet forms a tight blue-green globe just 1–2 feet across — a true collector's gem for rock gardens, alpine troughs, and miniature conifer beds in Edina, Plymouth, or Minneapolis.

Miniature and fairy gardens

Its tiny scale and dense globe shape make it perfect for miniature gardens, fairy gardens, and tabletop troughs, where it reads like a perfectly proportioned little tree.

Containers and entry pots

Growing only about an inch a year, Blue Planet is an ideal long-term container evergreen for a special pot by the door — it won't outgrow its home for many years.

Four-season interest at small scale

The tight blue-green globe holds its color and form through five months of Minnesota winter, adding a jewel-like evergreen detail when the garden is otherwise bare.

Best Time to Plant Blue Planet Spruce in Minnesota

For evergreens, the ideal window is late August through mid-September, giving roots time to establish before the ground freezes. Spring (late April–May, after the ground thaws) is the second-best option. Avoid summer planting. Never plant after mid-October or before late April, when frozen ground and frost-heaving kill new roots. Container plants can be set out anytime the ground is workable.

How to Plant Blue Planet Spruce

1. Dig wide, not deep — 2–3x the root ball width, the same depth as the ball.
2. It prefers well-drained ground — in heavy clay or a low spot, plant slightly high on a small mound so the crown never sits in water.
3. Backfill with native soil mixed with 20–30% compost; for troughs and containers use a gritty, well-draining mix.
4. Spacing — single plants need almost no room; space 12–18 inches apart for a tiny grouping.
5. Water basin — build a small ring around the planting to direct water to the roots. Flatten or remove it before winter to avoid ice damage.
6. Mulch — 1–2 inches of fine bark mulch, kept off the stems. (Decorative stone over the soil in a trough is fine; just don't rely on gravel as the only insulation in the ground.)

Watering Blue Planet Spruce in Minnesota

First Year Watering Schedule

• Weeks 1–2: Every 1–2 days, deep and slow
• Month 1–2: Every 3–4 days
• Month 3–6: Every 5–7 days during active growth; less if rainfall is adequate (Minnesota averages ~3 inches/month June–August)
• Stop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities)
• Give one deep watering in early December if fall was dry — small plants and containers are especially prone to winter dryness

After Year One

Established plants are easygoing and only need supplemental water during true droughts. Container and trough plants dry out faster, so check them weekly in summer.

Will Blue Planet Spruce survive a Minnesota winter?

Easily — as a white-spruce selection it's reliable to roughly -40°F (zone 3). Trough and container plants benefit from being tucked against the house or heeled into a bed for their first winter.

How big does it get?

Tiny — about 1–2 feet after many years, growing only an inch a year. It's prized precisely because it stays so small and perfectly globe-shaped.

Is it deer-resistant?

Strongly. Deer almost always pass over spruce, so this little globe is worry-free even in high-pressure deer areas like Minnetonka, Wayzata, and Eden Prairie.

Does it need full sun?

Yes — full sun (6+ hours) keeps the globe tight and the color best. In shade it loosens and loses its neat shape.

You May Also Like

• Echiniformis Hedgehog Spruce — a tiny blue-green cushion for rock gardens and troughs.
• Dwarf Black Spruce — a low blue-gray bun of a Minnesota-native spruce.
• Blue Teardrop Spruce — a small blue, teardrop-shaped dwarf for beds and containers.
• Mr. Bowling Ball Arborvitae — a soft, ball-shaped dwarf arborvitae for low edging.

How Many Blue Planet Spruce Do I Need?

Blue Planet is a miniature specimen, not a hedge plant. Use one per trough, container, or rock-garden pocket where it can be admired up close. For a miniature conifer bed, plant in groups of 3–5 spaced 12–18 inches apart — at roughly an inch of growth a year, that spacing will look right for a decade or more.

Blue Planet Spruce Season-by-Season in Minnesota

• Spring: Fresh, slightly brighter blue-green new needle tips emerge over the older globe — subtle but charming at close range.
• Summer: The tight cushion of fine blue-green needles holds its perfect globe shape with essentially no pruning, staying neat through heat and humidity.
• Fall: Color and form stay unchanged while the rest of the garden winds down, making it a steady anchor in troughs and rockery pockets.
• Winter: The dense little globe shrugs off −40°F and holds its blue-green color under snow — a jewel-like evergreen detail for five months of Minnesota winter.

At a Glance

✔ Deer-Resistant   ✔ Evergreen   ✔ Four-Season Interest

Plant It With

• Echiniformis Hedgehog Spruce — a flattened blue-green cushion that pairs perfectly with Blue Planet's globe in a trough.
• Dwarf Black Spruce — a low, blue-gray native bun that adds contrast in texture at the same tiny scale.
• Blue Teardrop Spruce — its teardrop silhouette plays off Blue Planet's sphere in a miniature conifer collection.
• Mr. Bowling Ball Arborvitae — a soft, rounded dwarf arborvitae that echoes the globe form in a finer, sage-green texture.

Is Blue Planet Spruce Right for Your Yard?

Choose Blue Planet if you have a full-sun spot (6+ hours), reasonably drained soil or a trough with gritty mix, and you want a no-prune miniature evergreen that deer ignore — ideal for rock gardens, fairy gardens, and long-term entry pots. It's not a fit if you need real coverage or screening: at an inch of growth a year it will never fill space, and in shade the globe loosens and loses its shape.