Black Hills Spruce vs Silky Lupine - TreeTime.ca

Black Hills Spruce vs Silky Lupine

Picea glauca var. densata

Lupinus sericeus

CUSTOM GROW

Black Hills Spruce
Silky Lupine

Black Hills Spruce is a subspecies of White Spruce native to the Black Hills of South Dakota. It has a strongly conical form, slower growth rate and denser foliage than typical white spruce, making it preferable as a specimen tree for smaller suburban lawns. It also responds well to pruning, and can be used as a hedge or even bonsai.

Silky Lupine is a native perennial wildflower known for its upright spikes of blue to violet flowers. Blooming from late spring into summer, the nectar-rich, showy blossoms attract a variety of pollinators, especially bees and butterflies. The plant’s fine, silky foliage provides soft texture and visual interest, enhancing landscapes throughout the growing season.

Silky Lupine is a nitrogen-fixing plant that enriches soils and supports surrounding vegetation. Its deep roots stabilize soil, and it spreads naturally by ejecting seeds from drying pods. If spread isn’t desired, new seedlings are easy to remove. While it is foraged by some wild animals, it contains alkaloids that are toxic to livestock. Silky Lupine is well-suited to pollinator gardens, naturalization plantings, erosion control, and ecological restoration projects.

Black Hills Spruce Quick Facts

Silky Lupine Quick Facts

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Zone: 2b
Zone: 4a
Height: 25 m (82 ft)
Height: 0.6 m (2.0 ft)
Spread: 4 m (12 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: any
Moisture: dry, normal
Moisture: dry, normal
Growth rate: slow
Growth rate: medium
Life span: long
Life span: short
Growth form: clump-forming
Spreading: seeds - high
Suckering: none
Maintenance: medium


Toxicity: toxic to sheep and other livestock
Foliage: Silky-haired, palmately compound leaves
Flowers: Blue to violet pea-like flowers
Bloom time: mid to late summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no

In row spacing: 3 - 4 m (10 - 12 ft)

Between row spacing: 5 m (16 ft)
Native to: AB, BC