Black Hills Spruce — Picea glauca var. densata

Overview: Dense, formal, pyramidal evergreen famed for its toughness and cold hardiness. Short, rich green to slightly blue-green needles and strong branching make it a dependable windbreak or specimen across the Upper Midwest and Northern Plains.

Size & habit: Typically 30–50′ tall × 15–20′ wide; naturally full to the ground for many years; strong central leader.

Growth rate: Slow to moderate (≈6–12″ per year after establishment).

Hardiness: USDA Zones 2–6 (handles severe cold and wind).

Light: Full sun (will tolerate light shade but becomes looser).

Soil & water: Adaptable—sandy to clay loams; prefers well-drained soils. Tolerates slightly alkaline or acidic pH. Moderate drought tolerance once established; avoid chronically wet sites.

Foliage, cones & bark:

• Needles ½–¾”, stiff, four-sided, dark to blue-green; mildly aromatic.

• Small light-brown cones 1½–2″, pendulous; shed in late winter/spring.

• Gray-brown bark, scaly with age.

Tolerance / concerns:

• Tolerant: Cold, wind, urban conditions, and light road-salt spray (soil salt still stressful).

• Diseases/insects: Generally cleaner than Colorado Blue Spruce but can get Cytospora canker on stressed trees; occasional spruce budworm, sawflies, mites, and white pine weevil (protect leader on young trees).

• Deer: Usually avoided, especially once taller.

Pruning: Minimal. Maintain a single leader; remove only dead or crossed branches. Do not shear.

Landscape uses: Formal specimen, foundation anchor in large spaces, windbreaks and shelterbelts, year-round privacy screens, and northern/wildlife plantings.

Spacing (on-center):

• Single-row windbreak: 12–16 ft

• Dense screen/hedge: 10–12 ft

• Specimens: allow 15–20 ft from structures/trees

Notable selections / notes:

• Sold as “Black Hills Spruce” (seed source/strain) for superior density and cold toughness.

• Compact white-spruce cultivars with a similar look include ‘Technito’ (narrower, slower) for tighter sites.

Planting tip: Set the root flare at or just above grade; mulch 2–3″ (off the trunk); water deeply the first two seasons. For long-term health, choose an open, sunny site with good air movement and avoid over-irrigation.