The Original Dwarf Globe Blue Spruce for Minnesota Foundations

Montgomery Colorado Blue Spruce (Picea pungens 'Montgomery') is the classic dense dwarf globe blue spruce — tight, intensely silver-blue, and topping out at just 3–5 feet. Reliable to -50°F. The go-to choice for foundation accents, rock gardens, and small Twin Cities yards where you want maximum blue color in a compact footprint.

Montgomery Colorado Blue Spruce Plant Details

Montgomery Colorado Blue Spruce Uses in Minnesota Landscapes

Foundation Plantings and Rock Gardens

Montgomery's compact 3–5 ft size makes it the ideal dwarf blue spruce for tight foundation beds, rock gardens, and entry accents. Plant 5–6 ft from foundations and 4–5 ft apart for a continuous low blue ribbon.

Layered Mixed Conifer Beds

Pair Montgomery with larger blue cultivars like 'Hoopsii' or 'Fat Albert' for a tiered all-blue composition. Add Hetz Midget Arborvitae for green contrast.

Best Time to Plant Montgomery Colorado Blue Spruce in Minnesota

Fall — late August through mid-September — is the ideal planting window for evergreens like Montgomery Colorado Blue Spruce. Soil is still warm enough for root development, cool air reduces transplant shock, and the plant gets 6–8 weeks to establish roots before the typical mid-November ground freeze in the Twin Cities. The earlier window matters specifically for evergreens because they continue losing moisture through their needles all winter, so root establishment before freeze is critical.

Spring (late April through May, after ground thaw) is the second-best window — you get a full growing season ahead. Avoid summer planting (June–August) when possible; if you must, water heavily and mulch deeply. Never plant after mid-October or before late April, when frozen ground or frost-heaving will kill new roots.

How to Plant Montgomery Colorado Blue Spruce

1. Dig wide, not deep — 2–3x the root ball width, same depth. In heavy clay, dig even wider (3–4x).
2. Check for clay hardpan — if water pools in the hole, break through the clay layer or mound-plant 2–3 inches above grade to improve drainage.
3. Backfill with native soil mixed with 20–30% compost. Don't fill the hole with pure compost — it creates a "container" effect that traps water around the roots.
4. Spacing — 4–5 feet apart for continuous low border; 6+ feet for individual specimens.
5. Build a 3–4 inch water basin around the plant to direct water to the roots. Flatten or remove the basin in late October to prevent ice damage over winter.
6. Mulch with 2–3 inches of shredded bark or wood chip mulch, kept 2 inches away from the trunk. Do NOT use gravel mulch — it doesn't insulate roots in Minnesota winters.

Watering Montgomery Colorado Blue Spruce in Minnesota

First Year Watering Schedule

• Weeks 1–2: Every 1–2 days, deep and slow (15–25 minutes)
• Month 1–2: Every 3–4 days
• Month 3–6: Every 5–7 days during active growth; less if rainfall is adequate (Minnesota averages roughly 3 inches/month June–August)
• Stop watering 2–3 weeks before ground freeze (typically late October in Twin Cities metro). Continued late-fall watering can push tender new growth that gets killed by winter.
• One deep watering in early December is a good idea for evergreens if fall has been dry — it helps the plant resist winter desiccation.

After Year One

• Established Montgomery Colorado Blue Spruce rarely needs supplemental water. Water deeply during droughts (2+ weeks of no rain combined with temps above 80°F).
• Soak to 6–8 inches depth, every 7–14 days during dry spells. Let natural rainfall do the rest.

Drip Irrigation in Minnesota

Drip works well for Montgomery Colorado Blue Spruce if your beds already have a system. Place emitters 12–18 inches from the trunk. Always blow out lines and shut off the timer by early October — frozen drip lines split.

Will Montgomery survive a Minnesota winter?

Yes — rated to USDA zone 2 (-50°F).

Is this the same as Globe Blue Spruce ('Globosa')?

Similar but distinct. Both are dwarf rounded blue spruce. 'Montgomery' is denser and tighter; 'Globosa' is the older traditional cultivar with a slightly more open habit. Both reach 3–6 ft mature.

How fast does Montgomery grow?

Very slow — 2–4 inches per year. A 10-gallon plant reaches mature 3–5 ft in 15–20 years.

Will deer eat it?

Rarely. Stiff sharp blue needles deter deer reliably.

You May Also Like

• 'Globosa' Globe Blue Spruce — Similar dwarf form — pair for variety in mixed blue conifer beds.
• Hetz Midget Arborvitae — Green dwarf globe that contrasts with Montgomery's blue.
• Karl Foerster Grass — Vertical accent contrasting Montgomery's rounded form.
• Russian Sage — Lavender-blue summer flowers echo Montgomery's needle color.

How Many Montgomery Colorado Blue Spruce Do I Need?

For a continuous low blue ribbon along a foundation or border, space Montgomery 4–5 feet apart (the body's own spacing for its 4–5 ft mature width):

As a single accent, give it a 6-foot circle at a foundation corner or rock-garden focal point — and remember it builds size very slowly, so buy the largest container you can if you want presence right away.

Montgomery Colorado Blue Spruce Season-by-Season in Minnesota

• Spring: A fresh flush of new growth in the brightest silver-blue of the year tips every branch — the annual highlight on this very slow grower.
• Summer: A dense, tight steel-blue mound that anchors the bed while perennials come and go around it.
• Fall: The blue reads even stronger as surrounding foliage yellows and drops — no fall mess, no cleanup.
• Winter: Fully evergreen and rated to -50°F; a silver-blue dome above the snow that carries the foundation bed through five months of winter.

At a Glance

✔ Deer-Resistant   ✔ Drought-Tolerant   ✔ Evergreen   ✔ Four-Season Interest

Plant It With

• Globe Blue Spruce — the classic 'Globosa' from this plant's own FAQ; pair the two dwarf blues for subtle texture variety.
• Hetz Midget Arborvitae — the dark-green dwarf globe the body recommends for color contrast.
• Fat Albert Colorado Blue Spruce — the mid-size blue the body suggests for a tiered all-blue composition.
• Karl Foerster Feather Reed Grass — vertical wheat-gold plumes against Montgomery's rounded blue mound.

Is Montgomery Colorado Blue Spruce Right for Your Yard?

Montgomery wants full sun (6+ hours) for its best blue, tolerates Minnesota clay-loam, shrugs off deer and drought once established, and stays genuinely small — perfect for tight foundation beds and rock gardens. It's not a fit if you're impatient or shaded: at 2–4 inches of growth a year a small plant takes 15–20 years to mature, and in part shade the silver-blue color dulls noticeably.